Mont Guillaume

A pleasant walk to one of the main and most beautiful viewpoints over Lake Serre-Ponçon.
Due to the large number of junctions, I recommend using the Visorando app.

Details

n°290357
Creation:
Last update:
–
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 8.01 mi
  • ◔
    Average duration: 6h 25 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 3,114 ft
  • ↘
    Descent: - 3,114 ft

  • ▲
    Highest point: 8,330 ft
  • ▼
    Lowest point: 5,217 ft

Photos

Description of the walk

Access: From Embrun, take the N2094 through the town centre towards Briançon-Gap, then, just before the post office, turn right and follow the D465 towards Caléyère. Pass the hamlet and then the castle of the same name. Continue to the car park on the right-hand side of the road. The distance from the post office in Embrun is approximately 10 km along a fully tarmac-surfaced road.

(S/E) From the car park, turn left onto the track and follow it for about thirty metres towards Mont Guillaume via Pré Clos. At the signpost, turn right onto the path towards Mont Guillaume and the Chapelle des Séyères for 200 metres.

(1) At the junction and signpost, go straight on towards the chapel. The path climbs through a dense larch forest before joining a lane.

(2) At the signpost, turn 90° to the left, still heading towards the Chapelle des Séyères and Mont Guillaume. Follow this avenue for about 80 metres.

(3) At the next signpost, continue in the same south-westerly direction, then follow this path for 980 metres until you reach the next junction.

(4) Leave the track and turn right onto the path towards Mont Guillaume. The path climbs gently up the hillside through a forest of larch and Scots pine, then crosses a wide track of ploughed earth. Our path eventually turns into a track.
From here, pay close attention. A cairn on the left-hand side of the track marks the start of a small path that branches off diagonally.

(5) At the cairn, take this path on the left. It climbs for about twenty metres. Cross the wide, hard-packed earth track, then continue along the path to the next clearly signposted junction.

(6) At the signpost, take a sharp left-hand bend to join the Widman path towards Mont Guillaume.
A little further on, when you reach a junction (path and track) which does not appear on the IGN map, continue in the same direction. The track turns into a path and crosses a rocky area before emerging at another signposted junction.

(7) Take the path on the left, cross the Sainte-Marthe stream, reach the Chapelle des Séyères and, just after that, the fountain of the same name in the same direction. Then take the path southwards to the next junction.

(8) At the signpost, take the hairpin bend to the right towards Mont Guillaume. This path emerges from the forest and climbs, passing through rhododendron thickets and piles of boulders. Take the hairpin bend to the left and follow the hillside (south-east).

(9) To make the final ascent to the summit, at the junction, take the path on the right, which climbs more gently as it traverses. After a hairpin bend, the path continues along the slope beneath the northern ridge of the summit; it is not uncommon to encounter some snowfields here at the start of the season. After a final, steeper climb, you’ll reach the summit cross and the Mont Guillaume Chapel.

(10) Return in the opposite direction via the same route to the car park (S/E).

Waypoints

  1. S/E : mi 0 - alt. 5,217 ft - Car park by the track
  2. 1 : mi 0.15 - alt. 5,374 ft - Marked junction
  3. 2 : mi 0.53 - alt. 5,758 ft - Trail junction, marked path
  4. 3 : mi 0.58 - alt. 5,778 ft - Marked path junction
  5. 4 : mi 1.15 - alt. 6,066 ft - Crossroads, marked path
  6. 5 : mi 1.49 - alt. 6,325 ft - Crossroads on the lane, unmarked path
  7. 6 : mi 1.68 - alt. 6,450 ft - Marked trail junction
  8. 7 : mi 2.03 - alt. 6,719 ft - Trail junction, marked path
  9. 8 : mi 2.29 - alt. 6,804 ft - Marked trail junction
  10. 9 : mi 3.23 - alt. 7,569 ft - Junction
  11. 10 : mi 4.04 - alt. 8,330 ft - Chapel and summit cross on Mont Guillaume. View - Lac de Serre-Ponçon
  12. S/E : mi 8.01 - alt. 5,217 ft - Car park by the track

Notes

I would like to point out that the section of the path between (5) and (6) shown on the IGN map does not correspond to reality and is very poorly marked. The IGN map is therefore not at all reliable for this section.
You should therefore refer to the route I recorded via GPS at this point.

At (7), there is indeed a junction of paths. A path leading off from the hairpin bend is not shown on the IGN map.

Finally, we built a cairn (6) to mark a Y-junction where there were no signs.
Please feel free to add stones to this cairn when you pass by.

I’ve made a video with a panoramic view and the names of the peaks, showing the route and the main waypoints along the trail.

Reviews and comments

4.8 / 5
Based on 25 reviews

Reliability of the description
4.7 / 5
Ease of following the route
4.8 / 5
Route interest
4.9 / 5
Britanicus100
Britanicus100

Oh yes, it’s absolutely lovely. It’s a hike I’ve done twice. The first time was with the Briançon hiking club, ARBB, and the second time was with my wife, to make the video for my YouTube channel, ‘Randonnées montagnardes’, and to write the guide. I left Briançon in 2018. You’re bringing back some lovely memories.

Machine-translated

User 23813603

Overall rating : 4.3 / 5

Date of your route : Aug 03, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

A lovely walk with some beautiful views

Machine-translated

verotitiflo
verotitiflo

Overall rating : 5 / 5

Date of your route : Jun 16, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A lovely walk; in June there are magnificent flowers. The first two kilometres are a bit steep, but after that the ascent is quite manageable, with a few patches of snow. The view from the summit is spectacular, with a 360-degree panorama. We did it with our dog without any problems. I’d recommend it – visiting the two chapels is well worth it.

Machine-translated

Tommy05
Tommy05

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 : Yes

A magnificent, very varied hike. Access to the forest car park from Embrun is via a long single-lane road, which requires caution when passing other vehicles. The route through the Clot Jarry forest is closed due to forestry work. You need to join the path that comes from Muandes de Bourlinche. After the Mont Guillaume chapel, it is well worth continuing along the ridges, where the view of the lake and the southern Alps is breathtaking. The descent via the Col de Trempa-Latz is steep but easy and joins the uphill trail or leads directly to the Séyères chapel by following the torrent. Allow for a 1,000 m elevation gain for the entire circuit.

Machine-translated

User 3518071
• Edited:

Overall rating : 4.7 / 5

Date of your route : Jul 21, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

A beautiful hike, shaded in the first part (up to the Seyères chapel) and increasingly open as you approach the summit (2,552 metres). We saw marmots basking in the sun at the entrance to their burrows in the last part of the trail.
The summit offers a magnificent view of Lake Serreponçon, as well as a 360° view of the entire region.
We left the forest car park just before 9 a.m. and climbed to the summit before descending to the first chapel for lunch at 12.30 p.m. There is plenty of water nearby to cool off.
We recommend this hike, even though it is busy in the height of summer.
We came back down via the forest path. We strongly advise against this, as it is not very shaded and not particularly enjoyable. In fact, we left it as soon as it got close to the path we had taken on the way up.

Machine-translated

Randophil57
Randophil57

Overall rating : 5 / 5

Date of your route : Jul 07, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

It is important to follow the author's route, which is the best way to reach Mont Guillaume. The other paths are either closed due to forestry work or less interesting as they are wide forest tracks.
Otherwise, the hike is fairly easy, with a steady elevation gain and magnificent vegetation featuring martagon lilies in abundance.

Machine-translated

Vero73450
Vero73450

Overall rating : 4.7 / 5

Date of your route : Aug 05, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

The hike is very well explained and the route is perfect. Be sure to follow the route rather than the yellow signs, as the paths are more difficult and not maintained. So stick to the route! There are still many trees to climb over, as they are still on the ground

Machine-translated

E. MULLER
E. MULLER

Overall rating : 5 / 5

Date of your route : Jul 30, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A superb hike that begins with a beautiful larch forest. Numerous alpine flowers can be found along the route (July). There is an easily passable snowfield. Marmots can be spotted. Magnificent view of Lake Serre-Ponçon from the chapel terrace. You can even see Mont Ventoux in the distance.

Machine-translated

Manu d'Aix
Manu d'Aix

Overall rating : 5 / 5

Date of your route : Jul 19, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A great effort rewarded with a splendid panoramic view.
There were still a few snowfields to cross, including one that had to be traversed...
We finished at the Trempa-Latz pass. This offers a view over Lac Brun.
Be careful with the route suggested by Google Maps depending on your starting point: part of it is not accessible by car!

Machine-translated

Alamaya
Alamaya

Overall rating : 4 / 5

Date of your route : Jul 24, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

Beautiful hike, shaded at first, then a rocky trail on the mountainside in full sun ☀️

Machine-translated

Jean Marc1
Jean Marc1

Overall rating : 5 / 5

Date of your route : Oct 03, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

To be enjoyed without moderation

Machine-translated

CACOIN
CACOIN

Overall rating : 5 / 5

Date of your route : Sep 12, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

VERY BEAUTIFUL HIKE WITH AN EXCEPTIONAL VIEW OF LAKE SERPONÇON.
FOR EXPERIENCED HIKERS AS THERE ARE MANY SLOPES.

I RECOMMEND IT.

Machine-translated

Phasme91
Phasme91

Overall rating : 5 / 5

Date of your route : Jul 05, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

A magnificent hike, we returned via Lake Hivernet, a beautiful little lake

Machine-translated

velostef
velostef

Overall rating : 5 / 5

Date of your route : Feb 06, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

very good and very practical, thank you for your work and even more for sharing

Machine-translated

ctournier
ctournier

Overall rating : 4.3 / 5

Date of your route : Oct 26, 2018
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

Don't bother too much with the description, which is out of date (cairn???), but follow the markings in place, which are very clear. The path is well laid out, the slope is steady, so the climb is not difficult.
There is a beautiful view from the summit.

Machine-translated

Other walks in the area

For more walks, use our search engine .

The GPS track and description are the property of this route's author. Please do not copy them without permission.