Water source: Fontaine des hollowed-out tree trunks serving as drinking troughs.
Bring enough water before you get there. There are no other water sources nearby!
Equipment required: Map 3236 OTR. Camping and hiking equipment, food for 2 days.
Two-day route starting from Champ de l'Herse. It passes through the Brisou ridge with a first panorama before reaching the Grand Veymont (2341m), which offers a magnificent view of the Vercors high plateaus, Mont Aiguille and the valley. Good chances of seeing ibex and marmots.
Details
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Activity: Walking -
Distance: 18.45 km
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Average duration: 2 days
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Difficulty: Difficult
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Back to start: Yes
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Ascent: + 1,766 m
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Descent: - 1,767 m
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Highest point: 2,320 m
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Lowest point: 1,246 m
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Country: France
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District: Gresse-en-Vercors (38650)
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Start/End: N 44.892441° / E 5.547627°
Photos
Stages of the route
This route needs several days, find the details below:
Notes
This route passes through a protected area, which may be subject to special regulations:
Worth a visit
View of the Brisou ridge.
View of the high plateaus on Mont Aiguille, the valley and the plateaus.
Magnificent view of the Grand Veymont.
Ibex and marmots to observe.
Reviews and comments
4.6 / 5
4.3 / 5
4.9 / 5
Overall rating : 4.7 / 5
Date of your route : Aug 11, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes
We did this circuit on 9 and 10 August 2025. A very pleasant loop with varied landscapes and a beautiful spot for camping not far from the spring – ideal! Despite the heatwave, the spring at Pas des Bachassons was still flowing.
Be careful, however, as the trail is not always well marked on the first day, especially when crossing ravines. The trail is not particularly difficult but a little technical in places.
We saw marmots and ibex, and the view of Mont Aiguille and the Hauts Plateaux du Vercors is magnificent.
We recommend this route for two days. The distances given on Visorando are not accurate:
Day 1: 13km and 1,000m elevation gain
Day 2: 9 km and 500 m elevation gain (and mostly downhill!)
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Overall rating : 5 / 5
Date of your route : Aug 26, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes
Hike completed on 24-25 August 2024
- Part 1: the first climb took 1 hour 15 minutes, then the flat section took 3 hours and finally the last climb took 1 hour 15 minutes (at a leisurely pace). There was no difficulty in finding the path, even in the ravines, which are not very steep. That's 5½ hours of walking, so there's plenty of time to enjoy Brisou and arrive at Les Bachassons.
- Part 2: from the foot of Grand Veymont, I estimated 1 hour 30 minutes to make the climb at a leisurely pace.
After a good break, it took me 2 hours to descend at a good pace.
It was busier than usual on the last weekend of August, but there is so much space between the fountain and Grand Veymont that 15 tents had no trouble staying well spaced apart. I pitched my tent just before the climb.
Varied and splendid landscapes. Ibexes with their young. On the second day, which was cloudy and grey, the start and top of the Grand Veymont were above the sea of clouds, it was absolutely magnificent. Before the crossing during the descent.
Thank you for this magnificent hike.
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Overall rating : 4.3 / 5
Date of your route : Aug 20, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No
Hike completed on 20 and 21 August 2023 (heatwave period): very pleasant route, mostly in the shade on the first day (much of it in the forest, with only the last 2 kilometres of the climb exposed to the sun. The second part, however, is almost entirely in the sun (make sure you don't set off too late if it's hot!).
On the first part, the path is quite dangerous in places (some sections are a bit rocky, etc.), but it's passable without too many problems.
The only thing to bear in mind is that the distances on Visorando are not accurate! The first day (from Gresse to the Bachassons pass), which is shown as being around 10/11km, is actually closer to 15 or 16km (measured with my Garmin Forerunner 645 watch). It's not a big deal, but it's worth taking into account.
PS: even in the middle of a heatwave, the fountain was flowing well!
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Overall rating : 4.3 / 5
Date of your route : Jul 18, 2019
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
A very beautiful two-day hike, as described, with a bivouac 1 km above the Aiguillettes hut.
WARNING: I used up a lot of energy crossing the Barri ravine and even almost turned back because the ravine had become much deeper and wider. I had to climb down quite low to find a way across (after searching above, but it was very risky with my heavy rucksack).
Then it was quite difficult to climb back up the ravine. The recent storms have caused a lot of damage! I had been there two years ago and it was already quite ravined but still passable. The other ravines are less difficult. The GPS track is not very accurate a little further on, but that's not a problem, just follow the yellow/green markers.
In any case, the scenery is still as magnificent as ever.
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Overall rating : 4.3 / 5
Date of your route : Aug 21, 2018
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
A magnificent two-day hike with a small bivouac at Pas des Bachassons, as recommended – perfect!
Splendid landscapes in the company of ibex and a few marmots. The water source at the bivouac site was a lifesaver, as there are none along the rest of the route.
However, it is a very physically demanding hike, requiring two six-hour walks.
Bring walking poles for the descent if you have sensitive knees.
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Overall rating : 4.7 / 5
Date of your route : Aug 19, 2017
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Hello,
A very beautiful day-long hike.
Beautiful trails, splendid and varied landscapes, a few ibexes, but I wasn't quite fit enough to enjoy it fully, and the wind and rain at the summit of Grand Veymont didn't help.
There is a lot of scree in the ravines, as well as on the climb up the Pas des Bachassons, which sometimes forces you to make detours around the rocks to cross over and rejoin the path on the other side.
If I had to do it again, I think I would do it over two days. This hike should be avoided in spring when the snow is melting.
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Overall rating : 4.7 / 5
Date of your route : Jul 16, 2016
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
A very beautiful hike completed in July 2016 on the same route.
Ideal for those who want to discover some of the flora and fauna of the Vercors.
Beautiful panoramic views throughout the hike. 
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Other walks in the area
Gresse en Vercors - Pas des hollowed-out tree trunks serving as drinking troughs
Grand Veymont loop via the Côte de Quinquambaye
The Grand Veymont from Gresse-en-Vercors
Balcony below Grand Veymont
Balcons de Gresse-en-Vercors
The Col de l'Allimas via the flower trail
Le Grand Brisou via the Crête des Alleyrons
Pas du Serpaton - Rocher du Cléton route
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