4.3
(910)
9,103
riders
263
rides
Mountain biking around Réserve naturelle de Passy offers diverse terrain set against the backdrop of the Mont Blanc massif and the Arve Valley. The region features a mix of crystalline slopes, limestone cliffs, alpine meadows, and forests, with altitudes ranging from 1,300 to 2,900 meters. This geological variety provides a range of environments for mountain bikers. The area is known for its panoramic views and varied natural features.
Last updated: April 30, 2026
5.0
(2)
26
riders
22.1km
03:18
1,270m
1,270m
Experience a difficult 13.8-mile mountain bike loop to Lake Pormenaz from Plaine-Joux, offering stunning views in Passy Nature Reserve.
1
riders
11.3km
01:30
580m
580m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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11
riders
9.10km
00:50
310m
310m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
3.0
(1)
4
riders
28.3km
03:41
1,230m
1,230m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4
riders
6.69km
00:52
310m
310m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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Impressive suspension bridge that you cross to reach Lac Vert.
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A beautiful family hike below Les Fiz and Pormenaz, with a beautiful view of Mont Blanc and the valley. From here, you can access Lake Pormenaz via three trails, including "La Chorde," reserved for those with mountain feet, with cable passages and ladders, and "Les Argentières," a less challenging route with cable passages and steps, and then the one passing through the Pierre à l'Ours on the mountainside.
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the video of the sallanches - lake of Pormenaz route https://youtu.be/l23IUvTwiSc?si=zyzWhbqQLNobocY-
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Le Chatelet D'Ayères at 1.415m altitude is a small family accommodation at 1415 m altitude, nestled close to the Fiz mountain range with excellent views of Mont Blanc
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A small lake in the forest, right next to the road
5
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Good restaurant with great views of the Mont Blanc massif
2
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down this side of the mountain it's rough and loose gravel so not ideal for a road bike, even though I did to get to see the bridge !
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Unfortunately, due to French national park rules, dogs are not allowed to cross the trail - not even if they are on a leash. Camping is also prohibited.
2
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There are over 250 mountain bike trails around Réserve naturelle de Passy, offering a wide range of options for different skill levels and preferences. The komoot community has explored these routes over 8,000 times.
The terrain in Réserve naturelle de Passy is highly diverse, ranging from gentle crystalline slopes to steep limestone cliffs of the Fiz mountain range. You'll encounter alpine meadows, heathlands, wetlands, and forested areas. Trails vary from moderate paths to difficult routes with significant elevation changes, often set against the stunning backdrop of the Mont Blanc massif.
Yes, Réserve naturelle de Passy offers trails suitable for beginners. There are 32 easy routes and 59 moderate routes. For a moderate option, consider Servoz from Plaine-Joux in a loop, which is 7.0 miles long and provides views of the alpine landscape and Arve Valley. Another moderate choice is the Plaine-Joux – The Blue Door loop from Lac Vert, a 5.6-mile trail through forested areas.
For experienced riders, there are 163 difficult trails in Réserve naturelle de Passy. A notable challenging route is the Pormenaz Loop Trail, a 13.8-mile difficult route with over 1,200 meters of elevation gain, offering stunning views including Lac de Pormenaz. The region's diverse terrain includes sections that may require advanced riding skills and good fitness.
Yes, many mountain bike routes in Réserve naturelle de Passy are circular. Popular loop trails include the difficult Pormenaz Loop Trail, the moderate Servoz from Plaine-Joux in a loop, and the Plaine-Joux – The Blue Door loop from Lac Vert. Another option is the Plaine-Joux – Nant Bordon Suspension Bridge loop from Lac Vert.
The trails offer breathtaking views of the Mont Blanc massif and the Arve Valley. You can encounter picturesque water bodies like Lac de Pormenaz and various waterfalls. Notable mountain passes such as Col d'Anterne and Col de Salenton provide stunning vistas. The Moëde-Anterne Refuge is also a great resting spot with Mont Blanc views.
Yes, some areas are suitable for families, particularly with parental supervision. The Passy Plaine Joux area offers a figure-of-eight circuit that includes loops passing by Lac Gris and through the forest, as well as towards the paragliding launch area, which can be enjoyable for families.
The best time for mountain biking is typically during the warmer months when trails are clear of snow. Given that Lac de Pormenaz is frozen for a significant part of the year, the main mountain biking season generally runs from late spring through early autumn. Always check local weather conditions before heading out.
The area is highly rated by the komoot community, with an average score of 4.3 stars from over 850 reviews. Mountain bikers frequently praise the unparalleled views of the Mont Blanc massif, the diverse alpine terrain, and the picturesque lakes. The variety of trails catering to different ability levels is also a significant draw.
Yes, refuges like the Moëde-Anterne Refuge, situated at 2,000 meters and facing Mont Blanc, provide excellent resting spots after a day on the trails. Some even offer bivouacking options nearby for overnight stays.
As Réserve naturelle de Passy is a protected natural area, specific regulations regarding dogs may apply to ensure the preservation of wildlife and flora. It is advisable to check the official rules of the Réserve naturelle de Passy before bringing your dog on the trails. Generally, dogs must be kept on a leash in nature reserves.
While specific parking areas are not detailed for every trail, access points like Plaine-Joux are common starting points for many routes and typically offer parking facilities. It's recommended to check the starting point of your chosen route on komoot for specific parking information.


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