From Lac de la Jasse to Prapoutel via Gros Cailloux

This is a magnificent, easy walk that takes you through many beautiful natural sites, with breathtaking views of the Grésivaudan valley and the Chartreuse mountains.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 4.95 km
  • ◔
    Average duration: 3h 20 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: No
  • ↗
    Ascent: + 683 m
  • ↘
    Descent: - 818 m

  • ▲
    Highest point: 2,021 m
  • ▼
    Lowest point: 1,381 m

Photos

Description of the walk

The hike starts at the arrival point of the Chamois chairlift, which you will need to take to begin the hike.

(S) From the chairlift, start descending towards Lac de la Jasse, taking care to avoid the mountain bike trails, where cyclists can come down very fast.

(1) When you reach Lac de la Jasse, head towards the Lac ski lift and take the path that starts nearby, to the left of the track. Although it is fairly gentle at first, the descent becomes steeper as you progress.

(2) Look for a gap in the fence on the left, which marks the start of a small path that descends gently between the pine trees. Once again, watch out for mountain bike trails that regularly cross this path. The path ends a little further down, merging with a very small stream which, although it does not have enough water to wet more than the soles of your shoes, will make the stones slippery enough to require extra caution.

(3) When you reach Gros Cailloux, take the path that branches off to the right. Follow it straight ahead until you reach the Chalet des Cortillets and the arrival point of the Bouquetins chairlift.

(4) Continue straight ahead, passing the arrival point of the chairlift, while following the path that then descends towards the departure point of the Lac chairlift.

(5) At the Lac chairlift, take the path to the left and descend to Prapoutel (E).

Waypoints

  1. S : km 0 - alt. 1,521 m - Arrival at the Chamois chairlift
  2. 1 : km 0.62 - alt. 1,918 m - Lac de la Jasse (1864m)
  3. 2 : km 1.52 - alt. 1,718 m - Crossroads
  4. 3 : km 2.09 - alt. 1,690 m - Large rocks
  5. 4 : km 3.26 - alt. 1,538 m - Chalet des Cortillets
  6. 5 : km 3.98 - alt. 1,520 m - Departure from the Lac chairlift
  7. E : km 4.95 - alt. 1,388 m - Departure from the Chamois chairlift

Notes

You can vary the route down from Lac de la Jasse to Prapoutel. There are loads of trails across the mountain, so it's pretty much impossible to get lost. Feel free to try out a few different options on this hike.

It is also possible to do a completely pedestrian loop without taking the Chamois chairlift. However, the significant elevation gain means that this hike is only suitable for people in good physical condition.

Worth a visit

From the Chamois chairlift arrival point, you can reach the Dôme des Oudis, which overlooks Pipay, and from there, the Pleynet slope and the Haut-Bréda valley.

Reviews and comments

5 / 5
Based on 1 review

Reliability of the description
5 / 5
Ease of following the route
5 / 5
Route interest
5 / 5
nivolet
nivolet

Overall rating : 5 / 5

Date of your route : Jul 22, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Nice little hike. It was a bit cloudy.

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