Grottes de Naye: 2 Climbs in the Swiss Cheese Mountain

Swiss Cheese Mountain: A Tale of 2 Climbs in Grottes de Naye

If you are tired of manicured Swiss walking paths and want to get covered in mountain mud, the Grottes de Naye (also called the Grotte du Glacier by speleologists) is near the peak of Pre-Alpine weirdness. 

Most tourists take the comfortable vintage cogwheel train straight from Montreux Station all the way to the summit. But if you want a real adventure, jump off early at the Jaman stop, with the via ferrata guys, hike up to the base of the limestone cliffs, and look for a dark, unassuming tear in the rock face…

This isn't a casual cave walk with ambient lighting and paved handrails like Beatus or Hollgrotto (see my other articles). What lies underneath is a massive, multi-kilometer underworld carved out over thousands of years by a trapped fossil glacier (more like Holloch). 

While the core of the subterranean glacier melted away over a century ago, the mountain still breathes a cold 4°C (39°F) chill, functioning as a vertical natural siphon that shifts dramatically between mid-summer and early autumn.

Route Summary

• Difficulty: T3 Mountain Hike, a dark, steep, technical, slippery cave scramble.

• Distance: min. 5 Kilometers round trip.

• Time: 2-3 hours total, 45-60 minutes are spent inside the cave itself.

• Elevation Gain: ~300m from Col de Jaman, 100m scaled vertically underground.

• Best Season: June to October - snow & ice block the inner caverns during winter and spring.

• Essential Gear: Headlamp or torch (mandatory), sturdy hiking boots with deep tread, warm layers and gloves you don't mind getting covered in muddy limestone clay.

To truly understand how much this mountain changes, you have to look at it through the lens of two completely different journeys.

1. July 2019: The July Snow Trap (my Downclimb)

Tackling the cave in reverse by downclimbing from the upper exit near the Grande Chaux de Naye introduces a psychological game. Instead of pulling your weight up, you are actively sliding down into a damp, limestone hole. The descent is a physical grind. You are constantly going down slick metal ladders bolted into the black rock and relying on freezing iron chains to lower yourself down near-vertical mud walls. 

Gravity is your enemy on the clay-slick steps, and the golden rule for ascending - consistently keeping to your left - flips into a disorienting mirror image on the way down. The real sting of a mid-summer climb, however, waits at the end. The lower mouth of the cave acts as a natural catchment for the mountain's winter snowpack. 

Arriving at the final, tight horizontal pinch point - the 20m boyau crawl - revealed a large, stubborn plug of packed winter snow and ice partly blocking the exit. Getting out required sliding through freezing limestone mud while carving makeshift footholds into hard snow just to squeeze back out into the sunshine.

2. Sept. 2021: a Clean Ascent & those Unprepared

Fast forward two years to early autumn, and the mountain presented an entirely different face. Approaching the lower entry from a circular path to the ladders above, the winter snow was completely gone, leaving the limestone dry, exposed, and ready.

This trip highlighted the ongoing engineering battle to keep this rugged route accessible. Historically, the external bypass path - the Sentier des Échelles (Ladder Trail) - relied on steep, rustic wooden ladders built directly against the cliff face. But after years of harsh alpine winters and rockfalls, those old steps were finally replaced. 

The new infrastructure encountered in Sept. 2021 featured robust, modern metal staircases engineered to bypass the most unstable rock features outside the lower cave mouth. These additions make the approach feel deceptively modern - but they do nothing to tame the raw, dark reality waiting inside the mountain.

The entry portals immediately strip away any illusion of safety. Attached to the heavy metal entry doors are stark, warning signs alerting hikers to the dangers ahead. Inside the damp limestone entrance, further signs warn you not to stray from the main path under any circumstances!

Because the cogwheel train from Montreux makes access almost effortless, the route frequently lures in completely unsuspecting day-trippers who ignore the warning indications. Halfway up the pitch-black vertical chambers, you often run into under-equipped tourists. 

Finding a couple stranded in the pitch black - navigating with nothing but weak smartphone flashlights, wearing poor quality footwear, and scared by the steep, dirty, vertical scramble - is a stark reminder of why this cave demands respect. 

For me it required stepping into the role of an impromptu mountain guide: sharing a high-lumen headlamp, offering physical coaching up the slick slopes, and guiding them area by area until they can safely see daylight again.

Deep Underground: a Secret Labyrinth & Permafrost Breakdown

For speleologists, the hiker's route is just a tiny transit tube. The wider Glacier Cave Network is a 4.8 Km matrix of vertical shafts (avens) and deep sinkholes that drop straight into the mountain's core. The hydro-dynamics of this network are amazing and increasingly volatile. 

The cave relies heavily on ancient internal permafrost acting as a natural structural "glue." As climate warming degrades this subterranean ice, it triggers some geological complications:

• Loss of Shear Strength: Frozen water acts as natural cement holding limestone cracks together. When it thaws, that rock loses its stability and internal friction, leading to creeping joints and structural sagging.

• Hydro-Fracturing: Thawing opens internal pathways for melting snow and rain. Water fills the cracks and acts like a hydraulic wedge, forcing rock apart and dramatically increasing rockfall risks.

• Infrastructure & Route Impacts: Underground cave ceilings, walls, and surface anchor bolts (like those securing safety ladders and via ferrata wires) shift or shear off as the underlying bedrock destabilizes. 

• NB: Because of these escalating risks, today the interior cave remains closed for ongoing geological stabilization projects.

Backpack Trap & the Left-Hand Directive

When navigating the main climber's path, you have to be prepared for the physical layout. The boyau crawl right at the lower mouth is a tight, claustrophobic choke point. If you are carrying a standard daypack (30L or more), you cannot easily slide through with it on your back. You are forced to remove it, tie it to a lanyard, or aggressively push and drag it ahead of you as you slide through the wet limestone clay.

Once you clear the crawl, the darkness opens up into branching chambers. Without any trail markers in the black void, the universal survival rule for the ascent is: hug the left wall and always keep left. Deviating to the right can quickly funnel you down exposed drops or dead-end fissures that descend into the deep, unmapped speleological network!

Blinding Light & Giant Horizons: the Summit Experience

Whether you are escaping a subterranean ice trap or hiking up via the exterior mountain paths, emerging onto the high alpine pastures is a big sensory shock. You leave the shadows and step directly into a soaring panoramic playground at 2,042m. The ridge lines offer legendary vantage points:

• Mont Blanc (4,810m): Anchoring the southern horizon like a massive white wall.

• Bernese Oberland Giants: The sharp, snow-covered crests of the Eiger, Mönch & Jungfrau piercing the eastern clouds.

• French Dents du Midi: The jagged, multi-crested ridge framing the backdrop behind the Rhone Valley.

• Tour d’Aï & Tour de Mayen: Two iconic twin limestone towers standing guard over nearby Leysin.

Historical Note: In the 1800s, local miners convinced there was gold hidden in the cave networks sneaked in with torches, leaving behind rickety wooden ladders that early explorers stumbled across in later on. No gold was ever found, but archeological treasure was left behind.

Exploring the Summit: Alpine Gardens, Marmots & Views

Once you reach the peak, the rugged alpine vibe transitions into a world-class mountaintop sanctuary. As well as the views, the summit plateau offers unique ways to spend an afternoon:

1. La Rambertia Alpine Botanical Garden

Perched precariously at 2,025 meters, La Rambertia is a living high-altitude sanctuary accessible via a narrow trail hugging the cliffside. Founded in 1896, this historic garden contains over 1,000 species of delicate alpine plants sourced from mountain ranges around the globe - from the Himalayas to the Andes.

Strolling through its protected, winding pathways feels like discovering a secret garden in the sky. Keep an eye out for the legendary, woolly Edelweiss, vibrant blue gentians, and rare mountain saxifrage.

• Best Time to Visit: June through Sept., when the flowers are in peak bloom.

• Pro Tip: Entrance is free, but the narrow path features steep drops - wear sturdy footwear and take your time.

2. Marmot Paradise (Parc aux Marmottes)

Located near the prominent radio communications tower and central photo spot, Marmot Paradise offers a rare look at six different species of alpine marmots from Europe, Asia, and North America. Watch these iconic, chubby rodents sunbathe on exposed boulders, chase each other across grassy slopes, or dive into underground burrows. The site also features an educational center detailing how these creatures hibernate for up to eight months a year:

• Highlights: Catch them early in the morning or late afternoon when they are most active before the midday heat.

3. Panoramic Alpine Viewpoint & Café Area

Step out onto the observation terrace adjacent to the summit restaurant for one of the most breathtaking views in Switzerland. Standing at 2,042m, you get an uninterrupted 360-degree panorama:

• To the West: The vast, crescent expanse of Lake Geneva (Lac Léman) shimmering far below, with Montreux sitting along the shore.

• To the South & East: Snow-capped Giants of the Vaudois and Valais Alps, including the Dents du Midi, Mont Blanc on clear days, and the jagged ridge of the Bernese Alps.

Grab an espresso or a traditional Swiss fondue from the café, snag an outdoor table, and soak in the cloud-level scenery.

4. Thrills on the Via Ferrata

For experienced climbers seeking an adrenaline rush, Rochers de Naye features two famous Via Ferrata routes starting near Col de Jaman.

• Experience: Clinging to the sheer vertical limestone rockface, these routes offer exposure with technical iron rungs, wire bridges & a cave entrance.

• Difficulty: Rated up to K5 E (extremely difficult), requiring specialized VF harness kit, helmet, gloves, physical condition and solid technique.

• Exit: Non-climbers up at the summit terrace can actually spot climbers topping out along the high ridge. (Check out my detailed Via Ferrata Guide linked in my other articles for a description…)

5. Overnight in Authentic Mongolian Yurts

For a truly unique Alpine stay, book a night in the traditional Mongolian Yurts stationed near the summit. Furnished with authentic wooden beds, thick insulation, and warm bedding, these circular tents accommodate up to eight guests:

• Why It’s Special: Once the last cogwheel train leaves for Montreux, the summit empties completely. You get to witness sunset over Lake Geneva in quiet solitude, stargaze without light pollution, and wake up to a crisp sunrise over the peaks. Worth its weight in gold I would assume…

6. Ridge Hiking & Descents to Montreux

Rochers de Naye is a paradise for hikers, offering everything from short ridge walks to leg-burning downhill treks:

• Sautodoz Ridge Walk: A popular ridge trail providing panoramic views on both sides as you walk along the spine of the mountain.

• Descent to Montreux (or Glion): A challenging downhill hike dropping over 1,600 vertical meters through alpine meadows, pine forests, and dramatic gorges like the Gorges du Chauderon.

• Hiker's Shortcut: If a 5-hour steep downhill sounds too hard on the knees, hike down to intermediate cogwheel stations like Jaman or Haut-de-Caux and catch the train the rest of the way down.

The Culinary Finish

When it is time to refuel, you have two distinct options:

• Panoramic Feast: Hit the Restaurant Alpin, built into the summit station. Sit by the massive glass windows overlooking the entire length of Lake Geneva.

• A Local Secret: Skip the summit train, hike the loop path down to the Col de Jaman, and pull up a wooden chair at the rustic Buvette de Jaman. It’s a family-run alpine hut where locals go for Rösti Tomme Vaudoise, coffee, etc.

From there, you just hop back on the hourly cogwheel train at the Jaman stop and coast all the way back down to Montreux, enjoying the views but covered in dirt and very tired.

This route was hiked by the Author in July 2019 & Sept. 2021. Contact me by email for photos or to ask questions.

Aletsch Via Ferrata: the Lost Zipline on the Gibidum Reservoir

Lost Tyrolienne: Chasing the Aletsch Via Ferrata

The Aletsch Via Ferrata encircling the glacial Gibidum Reservoir near Blatten (no not that one) has long been a crown jewel of the Valais region. While severe summer mudslides have temporarily closed this vertical playground, looking back at its historic configurations reveals an entirely different beast.

Before structural updates altered its design, 2019 was a great year to conquer this canyon. It was the final season featuring the legendary Tyrolean Traverse (zipline) and a unique dual-level pathway dictated entirely by fluctuating glacier waters.

Route Summary

• Difficulty: K3 (C - moderate) Long horizontal traverse just above the reservoir, normally clockwise, no easy exit route once started…

• Distance: ~13.5 km Optimized loop covering the gorge approach, technical sections out & back, and return trail.

• Time: 3 to 4 Hours Fluid pacing for clips, horizontal traverses, etc.

• Altitude: 1,310 m to 1,560 MASL.

• Elevation: +/-250m of cumulative climbing throughout the loop.

• Key Obstacles: Horizontal log bridges 80m Nepal Suspension Bridge 3-cable Monkey Bridges 2 vertical Crux Up-climbs - one 10m.

Packing Tips: Boots, Fuel, and Hydration

• Thick Hiking Boots are Mandatory: Don’t attempt this trail in flimsy trail runners or soft-soled shoes. Because this is a predominantly horizontal route, you will spend hours with your entire weight pressing down onto narrow iron rungs, cable strands, and jagged rock pins. Without stiff, thick-soled mountaineering or heavy hiking boots, those metal pins will dig into your feet long before you finish the VF loop.

• Pack Plenty of Snacks & Drinks: Even though you can clear the moving time in 3 to 4 hours, the physical exertion of the long route takes a toll on you. There are no water fountains or refueling points down in the gorge. You must pack plenty of high-energy snacks and a generous supply of water to sustain you through the grind.

Myth Busting: Will You See the Great Alpine Peaks?

Despite being named after the most famous glacier in the Alps, don't expect to see giant 4,000m snow peaks (like the Aletschhorn) or sprawling ice rivers on this route. Because you are climbing deep inside the vertical jaws of the Massa Gorge, the steep canyon walls completely mask the surrounding mountains.

It’s not a loss, though - what you lose in mountain vistas, you gain in an intense canyon atmosphere. The visual focus stays locked onto the towering rock walls, glaciated granite scars, and the stunning pool of the reservoir right beneath your feet.

Logistics: Getting There via Swiss Public Transport

One of the best parts about this via ferrata is how seamlessly accessible it is without a car. The major rail hub of Brig serves as your perfect launching pad:

• Bus Route: Directly outside the main train station at Brig, Bahnhof, hop onto the iconic bright-yellow PostBus Line 624 (Belalp Linie) heading toward Blatten.

• Journey: The bus winds its way through Naters and climbs up the panoramic mountain road, getting you to the mountain village of Blatten bei Naters (Luftseilbahn) in just 15-20 mins. The bus runs reliably at an hourly frequency throughout the day. See my other articles…

• Final Approach: Once you hop off at the Blatten village center, simply follow the well-marked hiking signs pointing northeast toward the Gibidum Reservoir (Stausee). It is a scenic, straightforward 1-kilometer walk (~15 minutes) along the road to reach the dam wall where the via ferrata officially starts (on the left).

Engineering Marvel & Route History: Harnessing the Massa Gorge

To truly appreciate the Aletsch VF, you have to understand the ground you are walking on. The entire loop circles the Stausee Gibidum, which is held back by the staggering Gibidum Dam. Built deep inside the raw limestone walls of the upper Massa Gorge, this massive double-curvature arch dam stands an imposing 120m tall & entered official service in 1969.

The reservoir's hydrology is entirely unique; roughly 65% of its catchment area is heavily glaciated, primarily fed by the direct melting run-off of the Great Aletsch Glacier. Because of this, the water trapped here is incredibly dense with glacial sediment ("rock flour"), giving the lake its signature milky-green opaque color.

This heavy sediment load creates severe friction on the downstream power turbines. To prevent catastrophic build-up, engineers completely drain and flush the entire reservoir once a year - a mechanical marvel that temporarily turns the canyon back into a roaring, dry riverbed - I wish I had seen this…

From Ancient Trails to High-Wire Adventure

The rock faces you scale aren’t just random canyon walls; they have a distinct timeline. Centuries before cables were anchored here, local Swiss herders and hunters used dangerous, rudimentary wooden ledges and narrow stone pathways to navigate the upper Massa Gorge to move livestock between the alpine pastures of Belalp & Riederalp.

The modern sport route as you know it was officially mapped out and opened by local Blatten mountain guides in 2014. Their goal was brilliant: create a low-altitude, highly originality-driven via ferrata that could use the granite cliffs of the Stockflüe while intimately skimming the changing waterline of a modern hydroelectric reservoir - there aren’t many routes like this!

1. Entrance: Passing the Guardian Madonna

The adventure kicks off directly from the dam parking lot, dropping you straight into a rocky channel down toward the water level. Right at the start of the route, chiseled neatly into the raw rock near the dam, sits a small statue of the Madonna (Virgin Mary). Passing her serves as a silent guardian blessing for climbers as they transition away from solid earth and clip their lanyards onto the continuous steel wire rope for the first time.

2. Outbound Western Shore: Logs & an Upper Bypass

Once past the entrance, the western shore tests your horizontal balance. This stretch features a section of dual-cable configuration designed to handle the fluctuating water levels of the hydro-dam reservoir:

• Lower Shelf Route (my 2019 Experience): When the reservoir is low, you skim the lower track immediately above the canyon floor. The highlight here is a series of thick wooden logs and narrow timber beams bolted horizontally into the faces. They lack standard iron foot rungs, forcing you to shuffle sideways along the smooth wood while staring straight down into the dry, stony reservoir bed.

• Upper Bypass (my 2021 Experience): When the reservoir fills to maximum capacity with vibrant, milky glacier runoff, the lower path can be completely submerged. You are forced to move onto the upper line right along the cliff wall, and into the forest, where the water literally lapping just a hand's breadth beneath your boots as you hang onto the upper rock path.

Liquid Turquoise Lake

Traversing along the waterline offers a spectacular visual treat. Thanks to the heavy 'rock flour' sediment washed down from the melting Aletsch Glacier, the reservoir water glows with an incredibly vibrant, milky-green turquoise color under the sun. There are usually lots of huge tree branches and logs floating in it as well…

3. Midpoint Apex: The Nepal Suspension Bridge

The path eventually converges at the northern vertex of the loop, channeling you directly onto the 80m-long suspension bridge. Suspended 40m in the air, crossing this swaying cable bridge offers an amazing view northward into the gorge [Gibidum Reservoir 1428 m]. It is incredibly rare because you cannot just drive up to see it you either have to hike deep into the canyon or scale the cliff rungs of the via ferrata to step onto its swaying wires.

4. No Quick Escape: a Brutal Emergency Exit

If you get tired of walking on metal pins at the halfway mark, there is an official emergency exit (Notausstieg) right by the northern bridge entrance. However, calling it an exit is a misnomer because it requires a grueling endurance hike to get back to safety.

Instead of a quick walk to a road, the emergency route forces you to unclip from the cables and transition directly into a strenuous, steep mountain hike. You must climb a punishing incline entirely out of the deep reservoir canyon up to the high walking trails, then connect to the historic Massaweg hiking trail. 

While finishing the second half of the rock face takes about an hour or so, taking the emergency exit takes 2 to 3 hours of continuous mountain hiking just to get back to your car. (Note that with the 2026 mudslide closure on the other bank, this is exactly what some adventurous climbers did!)

5. Room to Breathe: The Uncabled Terraces

One of the best design choices of the Aletsch Via Ferrata is its pacing. Just when your feet begin to cramp from the steel pins, the rock face relents. The safety cable disappears entirely as the path leads you onto wide, flat rock terraces or woodland paths.

Being completely untethered allows you to relax, move around freely, and soak in the absolute stillness of the canyon. Standing on these natural viewing decks in 2019 offered an unmatched perspective of the low reservoir basin, making it a great spot for a picnic or to snap a few photos before heading back into the horizontal gauntlet.

6. The Gauntlet: Monkey Bridges & Crux Up-Climbs

Just when your legs start to tire, the route throws a technical crux at you along the eastern face. Scaling one or two grueling vertical up-climbs (B/C) driven straight into the rock face creates a mental test. While the rest of the trail is a test of horizontal movement and effort, pulling your body weight straight upward here requires a real burst of upper-body strength.

The solid rock sometimes disappears, replaced by minimal steel monkey bridges two/three-cable tightropes where your boots balance on a single wire over the drop. Every step causes the foot cable to sway and vibrate, requiring total core stability.

7. Scrambling the Home Stretch: Slabs, Boulders and Dam Views

After the vertical crux, the terrain breaks open into beautifully smooth, inclined granite slabs that test your friction footing, followed immediately by a rugged boulder field of massive fractured rocks. Scrambling through this open zone treats you to the finest views of the day: a head-on, panoramic look down the canyon at the sweeping 120-meter face of the Gibidum Dam wall. It is a stunning visual reward right before you gear up for the final finish.

2019 Grand Finale: The Lost Tyrolienne

In 2019, instead of just hiking out, climbers reached a wooden launch platform on the eastern wall, unslung a specialized heavy-duty pulley, and clipped directly onto a massive steel zip-cable stretching across an alcove of the reservoir.

Stepping off that platform was a pure adrenaline rush - rocketing through the canyon air with the wind in your face and the reservoir water rushing beneath your boots, before a high-speed landing into a heavily padded tree zone on the opposite bank.

Gone Months Later: The Safety Shutdown

When you zipped across the gorge in 2019, you were enjoying a legendary alpine feature in its final months of existence. Unbeknownst to us summer climbers, the line was a growing liability for the operating company, Belalp Tourismus AG.

The landing zone was notoriously difficult to manage. For the zipline, specialized equipment with wheels equipped with a brake was highly recommended to properly control the rapid descent. Unfortunately, many climbers attempted to tackle the traverse without this, ignoring precautions, or missing the exact braking required. 

Climbers of different weights would gather too much momentum down the steep incline, resulting in a string of accidents, control failures, and severe, high-speed impacts into the landing zone rock faces and trees.

Due to these mounting safety hazards, the operator made the call to pull the plug. As soon as the autumn 2019 season wrapped up, engineering crews dismantled the launch pad, rolled up the cables, and permanently closed the zip-line forever. 

Today's climbers are denied that final gravity-fueled experience. Instead, they are routed away from the water via an uphill bypass trail that requires legwork to climb out of the canyon.

Postscript: The Brutal Reality of Shifting Alpine Weather (my 2021 loop)

To truly understand this canyon, you have to respect how fast the alpine weather can turn. While the 2019 trip was a picture-perfect sunlit run, a return trip in 2021 was pure survival. Right after stepping off the suspension bridge onto the eastern wall, the heavens completely opened. Within minutes, a torrential downpour transformed the vertical rock face into a freezing, slick gauntlet.

The very iron pegs and rungs that give you leverage became treacherous under the downpour. With cold-numbed fingers and soaking-wet gear, every placement of a boot required absolute focus to prevent a slip. 

Worse yet, being trapped on a sheer rock wall while clipped directly into a continuous steel safety cable - essentially a miles-long lightning rod - with thunder rolling by above is a nightmare scenario.

Tired, freezing, and soaked to the bone, there was no time to enjoy the scenic granite slabs or admire the boulder fields. The goal shifted completely: move as fast as possible, snapping carabiners forward in a blur, rushing past the cliffs, and sprinting down the final stretches back toward the safety of the concrete dam wall…

Nature Takes Back the Canyon: Recent Mudslide Closures

The extreme shifting weather patterns that climbers feel on their skin have a long-term impact on the stability of the entire canyon. A brief but violent thunderstorm triggered a massive mudslide and landslide directly above the Aletsch-Gibidum VF route.

The mud and loose earth cascaded down the cliffs of the Stockflüe, completely destroying vital safety infrastructure, burying key footpaths, and tearing away portions of the steel cabling. Local authorities and trail managers immediately put a strict "closed until further notice" warning into effect…

As shifting permafrost and heavy alpine rainfall continue to destabilize the Swiss Alps, these sudden mountain failures are a stark reminder of why respecting local closures is necessary for survival. While we wait for the Valais trail masters to clear the rock and anchor new cables, those who carry a 2019 GPS log hold a piece of alpine history: the year we zipped across the water of the greatest alpine glacier gorge.

Climbing in the rain is no fun...

Post-Climb Fuel: Where to Eat in Blatten

After hanging onto steel cables for hours, your arms and feet will be sore and your stomach will be empty. Once you complete the loop and make the 15-min walk back from the dam to the village center of Blatten bei Naters, there are excellent local spots to eat:

• Hotel-Restaurant Belalp (Blatten Center): Located right by the PostBus stop, this is a great spot for a traditional Swiss alpine recovery meal.

• Pizzeria Bella Nova: If you crave carbs of a different variety, this cozy local spot serves fantastic wood-fired pizzas with a crispy crust.

Optional Extension: Hiking to the Foot of the Dam

If you finish the VF loop and still have some energy left, don’t head straight back to the village. There’s a highly impressive optional detour that lets you truly appreciate the scale of Swiss civil engineering: a hike down to the valley floor at the very bottom of the dam:

• Route: From the main dam area, look for the narrow maintenance service road that drops sharply down the side of the gorge. It winds its way down via steep, sweeping switchbacks right into the shadow of the concrete wall.

• Experience: Standing at the base of the structure is a humbling experience. Looking straight up at a 120-meter vertical wall of solid, curved concrete towering over you makes you feel small. It is raw down there - looking up at the sheer rock walls of the Massa Gorge closing in around you, and watching the rushing water empty out into the lower riverbed.

• Worth the Extra Steps? Absolutely. It adds about 20–30 mins of walking and a bit of a steep uphill trudge to get back to the main trail, but it is easily one of the best photo spots in the valley and a perspective that most tourists completely miss.

This route was done by the Author in July 2019 and August 2021. See my other articles for hikes in this area, including the Aletsch Suspension Bridge hike not far upstream. Contact me by email for photos or to ask questions.

ViaStockalper: Hiking the Gondo Gorge from the Simplon Pass

Walking With Smugglers: Hiking the Gondo Gorge on ViaStockalper

Forget the standard Swiss postcard of pristine cows and gentle alpine meadows. If you want a trail with grit, massive stone fortresses, and a heavy dose of historical drama, pack your boots for the Simplon Pass to Gondo stretch of the historic ViaStockalper (Stockalperweg).

This isn't just a hike; it’s a time machine. For centuries, this razor-thin mountain gap was the ultimate trade artery - and smuggling route - connecting northern Europe to the riches of Italy. Grab your trekking poles, we’re leaving the windy heights of the Simplon Pass to plunge deep into the shadows of the Gondo Gorge…

Route at a Glance

• Route: Simplon Pass → Simplon Dorf → Gondo Gorge → Gondo. (Note: This covers Stages 2 & 3 of the 3-day ViaStockalper trek starting from Brig).

• Distance: ~18 km

• Time: 5 to 6 hours of hiking

• Difficulty: Medium (T2 to T3). Mostly gentle downhill, transitioning into dark, damp canyon paths, wet rock slabs, metallic catwalks, and rock debris fields.

• Elevation Gain: +230 m (mostly minor ascents leaving Simplon Dorf)

• Elevation Loss: -1,380 m (a long, sustained descent that can be hard on the knees)

• Best Season: June to October. The high-alpine pass can hold winter snow well into May, and the gorge catwalks can become dangerously slick or icy outside of these warmer months.

Blood, Salt & Gold: A Quick History of the Simplon Pass

The path you are walking isn't just an engineering feat - it has been a strategic backdoor to Europe for thousands of years:

• Inception (Roman Roots): Long before the stone bridges, the Simplon Pass was a rugged, wild trail. The Romans first recognized its strategic value, using it as a secondary path to move soldiers, messengers & early gold hunters through the Alps.

• Medieval Era & the Smuggler Kings: By the Middle Ages, the pass was a dangerous, lawless route controlled by local chieftains. It was heavily used by smugglers who risked their lives to move salt, wine & tobacco between Switzerland and Italy without paying heavy feudal taxes.

• Stockalper Boom (17th Century): Enter Baron Kaspar Stockalper, the "King of the Simplon." In the 1600s, this brilliant entrepreneur monopolized the regional salt trade. He upgraded the old medieval mule track, building the grand stone towers and hospices you pass on the trail to protect his massive cargo caravans.

• Napoleon’s Artillery Highway (1801–5): After his Italian campaign, Napoleon Bonaparte realized whoever controlled the Simplon Pass controlled the gateway to Milan. He ordered his engineers to build the first true, paved road over the pass - not for trade, but to roll heavy military artillery over the Alps.

• World Wars & the Swiss Fortress: During WWI & WWII, the pass transformed again. Fearing an axis invasion from the south, the Swiss military heavily fortified the Gondo Gorge. They tunneled deep into the granite mountain, turning the tight chasm into an impenetrable, secret military bunker system known as Fort Gondo.

Public Transport Access

The greatest luxury of this hike is the yellow PostBus (Line 641). The bus perfectly mirrors the hiking trail along the main road, making it easy to customize your start point or bail out early:

• From Brig to the Start: Catch PostBus 641 from the front of the Brig Bahnhof (Main Station). It climbs up the mountain, crossing the stunning Ganter Bridge, and drops you directly at the Simplon, Passhöhe in about 45 mins - see my other article.

• Returning to Brig: From the finish in Gondo, hop back on the PostBus 641 at the Gondo, Post stop. It runs all the way back up over the pass & delivers you back to Brig.

• The Safety Net: The bus stops at major milestones along the way (Simplon Dorf, Gabi & Alte Kaserne). If your knees give out or the weather turns bad, a transport point is never far away.

Things to Do at the Simplon Pass

If you arrive early via the PostBus, don't rush off immediately. The pass is a historical destination in its own right:

• Photograph the Simplon Eagle: Walk up to this massive 9m-tall stone monument built during WW2 by the Swiss Army's 11th Mountain Brigade. Fun fact: it was constructed using the very stones blasted out during the clandestine excavation of Fort Gondo!

• Visit Napoleon’s New Hospice: Wander over to this sprawling stone structure directly on the pass plain. Commissioned by Napoleon in 1801 but not finished until 1831 by the Augustinian Canons, it remains one of the largest mountain hospices in the Alps.

• Stroll Around the Rotelsee: A pristine alpine lake just a short 5-min walk from the bus stop. On a calm morning, the surrounding mountain peaks mirror perfectly across the water. Again, see my other articles on this area summer or winter.

Stage 2: Simplon Pass to Simplon Dorf

Distance: 9 km Time: ~2.5 hours Vibe: High-alpine freedom giving way to larch forests.

A Mountain Panorama

As you step off the bus at the Simplon Pass (2,005m), you are surrounded by giants. Look up to see the jagged ridge of the Hübschhorn towering directly over the pass to your left. To the south, the massive, snow-capped dome of the Fletschhorn (3,985m) dominates the skyline, its glaciers glittering on a clear day.

Historical Jewels & What to See

• Alter Spittel (1666): As you descend into the high moorlands, this stunning four-story stone tower appears in a clearing. Baron Kaspar Stockalper built it with a private family chapel on the top floor and an open room on the bottom floor where travelers could stay and eat for free.

• Barral House (1924): A bizarrely shaped, narrow architectural anomaly down the trail - a building 120m long but only 7m wide, built as a mountain retreat for aspiring priests. Now owned by the Swiss military.

• Maschihüs Mule Track: The trail transitions onto a well preserved section of the original medieval stone mule track, passing through a park-like wooded pasture flanked by ancient dry-stone walls and the rushing Chrummbach stream.

TRAIL MYSTERY: FAIRY TALE FOREST OF ROSSBODEN

As you wind down Stage 2 toward Simplon Dorf, you’ll pass through a strikingly eerie stretch of forest filled with dense, uniform, "half-height" larch trees growing wildly over giant mossy boulders. It feels like an ancient fairytale - but it is actually the scar of a catastrophic disaster.

On March 19th, 1901, a massive chunk of the Rossboden Glacier tore free from the peaks above. A colossal rock-and-ice avalanche slammed into the valley floor, burying the landscape under 50m of jagged debris and crushing dozens of homes and barns. The buried ice blocks took over five years to completely melt. Why are the trees so short here? 

1. They are young: The 1901 disaster completely wiped the slate clean. Every single larch you see here had to start from scratch at the exact same time.

2. They are struggling: The trees are fighting to grow directly on top of unstable, nutrient-poor glacial boulder piles. This harsh environment naturally stunts their growth, keeping the entire forest canopy low, dense & uniform.

3. Look Out For: The sudden shift in terrain. One minute you are walking on cow pastures, and the next you are stepping through a literal graveyard of glacial rock that nature is slowly trying to reclaim…

Where to Eat/Recharge

• At the Start (Pass): Fuel up with coffee and a hearty alpine breakfast at the Hotel Monte Leone at the Simplon Pass.

• At the Finish (Simplon Dorf): Reward yourself at the end of Stage 2 at the Hotel Fletschhorn or Bakery Arnold in the village square.

Stage 3: Simplon Dorf to Gondo

Distance: 9 km Time: ~3 to 3.5 hours Vibe: Dramatic, claustrophobic stone chasms.

A Mountain Panorama

Leaving Simplon Dorf, the wide alpine skies vanish. The massive granite massifs of the Seehorn and the Smuggler’s Peak (Furggen) squeeze the valley together, forcing you into the deep shadows of the Gondo Gorge.

Historical Jewels & What to See

• Äbi Warehouse Ruins: Leaving the village, you'll pass the structural stone shell of an unfinished 1676 warehouse that Stockalper was building right before his political downfall.

• Gabi Pitstop: As you reach the tiny hamlet of Gabi, keep your eyes on the cliffs. This is home to the famous Via Ferrata Gabi Simplon, an intense iron path that scales the sheer walls above the valley floor - see my other article…

• Alte Kaserne Transport Museum: Built in 1805 at the northern side of the canyon, this massive Napoleonic stone ruin sits directly over the river. Step inside the Ecomuseum Alte Kaserne. It is unstaffed, free, and open daily from 8:00 AM to 8:00 PM year-round. Across its multiple raw, stone floors, you can explore large picture panels, maps, and an audio-visual room detailing the 4 distinct transport eras of the Simplon Pass. It takes about 20 mins to tour and makes a perfect, shelter-friendly trail stop.

• Jaws of the Gondo Gorge (a Visual Payoff): Leaving the sunlight behind, you plunge into a dramatic, dark chasm where the valley walls completely close in. The environment here is cold, damp, and rugged, but the rewards are spectacular. The trail winds tightly along the crashing waters of the Diveria River, crossing a series of beautifully engineered historic footbridges suspended directly over cascading glacial waterfalls that thunder down into the river channels.

• Bachtschugge Landslide Zone (T3 Warning): When passing through the active landslide area, officially known as Bachtschugge, the path transitions into T3 terrain. You will cross raw rockfall debris fields where the ground is loose and uneven. Look out for the prominent signage warning hikers "DO NOT LINGER" due to acute rockfall risks. Keep your eyes & ears open, maintain a steady pace, watch your footing, and do not stop (long) for photos or rest breaks until you are clear of the debris zone.

Deep Under the Mountain: Fort Gondo

Just when you think the gorge can’t get any more dramatic, you run straight into a massive concrete wall blocking the canyon. This is Fort Gondo, a Swiss military fortification tunneled directly into the mountain during the World Wars. The standard public hiking trail actually goes directly through the heart of this via a 350m-long connecting gallery. You will walk through stone tunnels lit by minimal bunker lighting, catching glimpses of the gorge through tactical windows cut into the rock face.

How to Tour the Fortress Museum

While the transit tunnel is free, the hidden doors lining the path lead to the vast, multi-level bunker complex operating as the Festungsmuseum Fort Gondo. Inside, the rooms are preserved exactly as they were left, featuring historical cannon batteries, troop accommodations, and underground military kitchens:

• Public Guided Tours: Regular public tours run every Saturday at 2:00 PM from June to October. You do not need a group to join these.

• Private Group Tours: Available on request year-round by arranging a booking directly through the Simplon Ecomuseum.

• Duration & Cost: The comprehensive tour lasts roughly 1.5h and costs CHF 10.00 each (cash paid on-site).

• Meeting Point: Meet your guide at the fortress's North Entrance (Simplon village side).

• Gear Tip: Even in summer, the deep granite tunnels are pretty chilly. Pack a warm fleece or jacket specifically for the tour.

Final Stretch to Gondo

• Zwischbergen Cascade: Just before reaching the town, look up to see the breathtaking waterfall pouring down from the wild Zwischbergen Valley.

• Smugglers’ Gorge: As you emerge from the fortress tunnels and the canyon finally narrows toward its end, look closely to your left. You will pass the mouth of the legendary Smugglers’ Gorge (Zwischbergental entrance), a shadowy, historic cleft in the rock where contraband runners used to slip past border guards into Italy - see my other article on my search for the hidden VF route…

• Stockalper Tower: The trail ends under the shadow of this 7-story stone fortress built in the 1600s in Gondo. It served as both Stockalper's southern trading hub and a fortified stronghold. Today, it has been beautifully reconstructed after a devastating landslide in 2000.

Things to Do in Gondo

Once you arrive in Gondo, take some time to explore this tiny border outpost before catching the PostBus back to Brig:

• Explore the Stockalper Gold Mines: Gondo’s history isn't just salt & smuggling - it’s also gold! You can book a tour to explore the historic ruins of the gold mines in the nearby Zwischbergen Valley, where miners panned for gold as far back as Roman times - I am sad I never got to do this one…

• Hunt for Gondo's Talisman: When exploring the seven-story Stockalper Tower, keep in mind its resilient history. After the catastrophic mudslide in 2000, the building was completely restored - and engineers buried a historic 20-franc gold piece beneath its foundations to ensure the village's eternal good fortune.

• Stand at the Italian Border: Walk just a few hundred meters down the road from the center of town to see the Swiss-Italian border checkpoint. You can practically smell the espresso from the Italian side!

Where to Eat/Recharge on Stage 3

• Mid-Way Pitstop (Gabi): Stop at the Gasthof Gabi, a historic inn famously noted for hosting Napoleon on his journey over the pass. It’s the perfect place for a mid-hike lunch of Rösti or a cold platter of dried meats.

• Finish Line (Gondo): Celebrate your trek at the restaurant inside the beautifully restored Stockalper Tower (Hotel Stockalperturm), enjoying a mix of Swiss-Valais alpine dishes and northern Italian-influenced cuisine just meters from the border.

Gear & Packing List: What to Bring

Because the Gondo Gorge is deeply carved, narrow, and heavily shaded by massive rock faces, it remains distinctly dark, cool, and damp even on a hot summer day. There are absolutely no shops, water fountains, or snack stops once you enter the heart of the canyon. You must be entirely self-sufficient. Make sure your pack includes:

• Food/Snacks: Pack high-energy trail mix, bars, or sandwiches from the bakery in Simplon Dorf. There is nowhere to restock until you reach Gondo.

• Water: Carry at least 2L of water per person. Do not rely on finding natural mountain springs in the gorge.

• Warm Layers/Windbreaker: The temperature drops noticeably as you enter the canyon's shadows, and the roaring river creates a constant, damp draft. Keep a fleece or light jacket easily accessible - useful in the fort.

• Trekking Poles: Great for saving your knees on the punishing 1,380m descent, and vital for maintaining your balance on the T3 landslide debris fields & wet rock slabs.

• Boots with Solid Grip: Leave the running shoes at home. The T2+ wet metal catwalks and T3 rocky block fields demand proper hiking boots with deep, grippy outsoles.

• Lighten Your Load Tip: If you are tackling the full 3-day route from Brig, don't break your back carrying heavy gear over the rockfall slabs. You can book daily luggage transport directly through the ViaStockalper Tourism Office, allowing you to complete the tricky gorge sections with a nimble daypack.

This route was hiked by the Author on the 17th of October 2020. See my other article on summer and winter hikes on the Simplon Pass. Contact me by email for photos or to ask questions...