5.0
(7)
70
hikers
8
hikes
Mountaineering routes around Onex are characterized by the region's proximity to the Salève mountain, offering diverse and complex terrain. The landscape features limestone cliffs, forested slopes, and dramatic rock formations, providing a challenging environment for ascents. This area, part of the larger Geneva region, is known for its varied elevation changes and panoramic viewpoints. The terrain includes crags and steep paths, making it suitable for experienced mountaineers seeking demanding routes.
Last updated: May 9, 2026
5.0
(1)
19
hikers
11.9km
05:04
820m
820m
Hard mountaineering route. Very good fitness required. Mostly accessible paths. Sure-footedness required.
5.0
(4)
15
hikers
9.60km
04:31
750m
750m
Hard mountaineering route. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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5.0
(1)
12
hikers
Hard mountaineering route. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
7
hikers
7.10km
03:16
590m
590m
Moderate mountaineering route. Good fitness required. Mostly accessible paths. Sure-footedness required.
5.0
(1)
6
hikers
Moderate mountaineering route. Good fitness required. Mostly accessible paths. Sure-footedness required.
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La Corraterie is a narrow rocky ledge and cliff path on the west flank of Mont Salève (the so-called “Balcony of Geneva”) in Haute-Savoie (France). From here, you have breathtaking panoramic views of Lake Geneva, the city of Geneva, and the Jura Mountains. Highlights along the path besides the view ;-): ⭐ The passage cave Grotte d'Orjobet. ⭐ Trou de la Tine: An impressive natural rock arch and sinkhole formed by erosion in the cliffs of La Corraterie. ⭐ Numerous climbers can be observed on the vertical limestone walls. And here is the story behind the flag on the mountain path: It is not the Swiss flag, but the coat of arms of Savoy (meaning no white cross, but the bars extend to the edge). It all began in the late 1960s. American students from the nearby Adventist campus in Collonges-sous-Salève climbed the steep rock face after a night of revelry. Since the mountain offers a direct view of Geneva, they were firmly convinced they were in Switzerland. They painted a huge Swiss flag on the rocks. However, Mont Salève is geographically located in France (Haute-Savoie region). The local French residents found the Swiss flag on their mountain to be an affront. Local activists climbed up and painted over the Swiss cross, turning it into the coat of arms of Savoy (Cross of Savoy) to emphasize the French-Savoyard affiliation. To this day, unknown individuals (mostly from Geneva) regularly climb the wall at night to shorten the bars and turn the Savoy coat of arms back into a Swiss flag.
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Only open to go in a few days if the week - I think Wed, Sat and Sun. View is still good from outside!
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A beautiful view of Geneva, or rather, its clouds.
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Le Trou de la Tine (Trou of the Tine Cave) was formed by erosion on the flank of Mont Salève. It is a deep, sunken hole shaped like an open-topped barrel ("Tine" is an old dialect term for barrel, "trou" means hole). The cave's ceiling has collapsed due to erosion, revealing a natural "barrel" with a side opening. One can walk into the "barrel" through this side opening.
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Cycling down from Salève, this breathtaking view of the Geneva region and the lake is the final reward of this demanding climb. You can dream for a long time in front of this landscape, or have a drink, stretch out on the lawn, and watch the paragliders fly just above. SUMMER SEASON | FROM APRIL 1, 2025 TO NOVEMBER 2, 2025 Open daily. Last ascent at 6:30 p.m. | Last descent at 6:45 p.m. Late openings on Thursdays, Fridays, and Saturdays: Last ascent at 10:30 p.m. | Last descent at 10:45 p.m. The 360° terrace closes at 6:30 p.m. Prices: €18 (adult) / €13 (reduced) / €6.50 (children)
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Mountaineering routes in the Onex area are generally challenging, characterized by limestone cliffs and varied terrain. You'll find a mix of moderate and difficult options, with 3 routes rated as moderate and 5 as difficult, catering to experienced mountaineers seeking demanding ascents.
Yes, several routes around Onex are designed as loops, allowing you to start and finish in the same location. For example, you could explore the Chalet de Pré-Berger loop from Veyrier, which offers significant elevation gain, or the Crossing the trou de la roche – La Coraterie Cliff loop from Collonges-sous-Salève, known for its impressive rock formations.
The routes around Onex, particularly those on the Salève mountain, feature dramatic limestone cliffs, forested slopes, and unique rock formations. You might encounter specific landmarks like the Orjobet Cave or traverse the Croisette Pass, both of which are part of popular routes such as the Orjobet Cave – Croisette Pass loop from Collonges-sous-Salève.
While specific public transport details for each trailhead are best checked locally, starting points like Veyrier and Collonges-sous-Salève are typically accessible from the wider Geneva region. It's advisable to research local bus or train connections to these villages before your trip.
The mountaineering routes around Onex are generally rated as moderate to difficult, featuring significant elevation changes and complex terrain. While some shorter moderate options exist, such as the Crossing the trou de la roche loop from Collonges-sous-Salève, they still require a good level of fitness and experience. For families with younger children or those new to mountaineering, it's important to assess the difficulty carefully.
The komoot community highly rates the mountaineering experience around Onex, with an average score of 5.0 stars from 7 reviews. Mountaineers often praise the challenging nature of the terrain, the impressive rock formations, and the expansive views from the cliffs, particularly on routes like the Crossing the trou de la roche loop from Collonges-sous-Salève.
The region's proximity to the Salève mountain means conditions can vary. While specific seasonal advice isn't provided, the presence of limestone cliffs and forested slopes suggests that spring through autumn would generally offer the most favorable conditions. Winter mountaineering would likely involve snow and ice, requiring specialized gear and experience.
There is no specific information indicating that permits are required for general mountaineering on the routes around Onex. However, it's always good practice to check local regulations or any specific requirements for protected areas if you plan to venture off marked trails.
While specific parking facilities are not detailed for each route, trailheads typically originate from villages like Veyrier and Collonges-sous-Salève. You should be able to find public parking options within or near these communities. It's recommended to arrive early, especially during peak seasons, to secure a spot.
The mountaineering routes often start or pass through villages such as Collonges-sous-Salève and Veyrier. These communities, being close to the larger Geneva area, are likely to offer cafes, restaurants, or small shops where you can refuel before or after your ascent.
The routes around Onex offer panoramic viewpoints, particularly from the limestone cliffs of the Salève mountain. You can expect expansive vistas over the surrounding landscape, including glimpses of the Geneva region and its natural beauty, making the challenging ascents well worth the effort.
There are a total of 8 mountaineering routes documented around Onex, offering a variety of experiences for climbers. These include both moderate and difficult options, ensuring there's something for different skill levels.


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