Loop to Le Grand Mont

In the heart of the Beaufortain massif, a beautiful summit offering a wide and distant panorama.
Although not difficult, the final climb to reach the Grand Mont requires a minimum of attention to find your way.
(!) 4 August 2025: user report:
> However, I would like to point out that the western shore of Lac de St Guerin is closed to hikers by municipal decree due to the risk of rockfalls. The hike must therefore start and end on the eastern shore of the lake.

Details

14502883
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 14.33 km
  • ◔
    Average duration: 7h 35 
  • ▲
    Difficulty: Difficult

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 1,213 m
  • ↘
    Descent: - 1,216 m

  • ▲
    Highest point: 2,683 m
  • ▼
    Lowest point: 1,510 m

Description of the walk

Park in the car park overlooking Lac Saint Guérin.

(S/E) Descend towards the dam, cross it, then take the beautiful track that runs along the western shore of the lake to the end.

see the remarks in the Introduction regarding the prohibition of walking along the western side of the lake.

Turn left, towards the east, to follow the lake. Further on, leave the GRP® Tour du Beaufortain on your left. Cross the footbridge.

(9) Continue along the lake until you reach a fork.

(1) Take the route that climbs to the Col de la Louze, cross the Ruisseau de la Louze several times, and reach the Col de la Louze.

(2) Take thefirst path that climbs up to the right towards the Grand Mont. Climb diagonally up the Cornillon mountain, with a few sections where you will need to use your hands. Reach the ridge, switch to the other side and, after a short descent, reach the bottom of the valley until you see the sign for Les Marlhonnays.

(3) Note: see chapter: Practical information.
Climb up to the left, following the yellow markings, which are not always easy to see due to the numerous cairns.
Reach the Grand Mont via a very rocky route, often through a jumble of boulders and scree.

(4) Descend by the same route to the previous crossroads. The path is more visible on the descent as you are above it.

(3) Turn left to descend and reach the Col de la Forclaz via a beautiful balcony path.

(5) Turn into the valley, where the route runs more or less parallel to the Col de la Forclaz ski lift. Keep the Refuge de l'Alpage in the distance and continue to the bottom of the valley.

(6) Leave the refuge behind and turn right towards the Chalets des Rognoux. Cross a small stream, then climb back up the ridge and descend into the mountain pasture towards the Chalets des Rognoux, which are still in use. Go around the buildings on the right and you will reach a nearby intersection.

(7) Descend through the mountain pasture via a few large hairpin bends and you will soon come to another intersection, which is the alternative route of the Tour du Beaufortain.

(8) Descend to the right into the forest on a path that is difficult to walk on due to the many exposed roots. Return to the initial crossroads you passed on the way up.

(1) Turn right to follow the lake on the track leading to the Himalayan footbridge.

(9) Cross the footbridge and follow the lake on its eastern shore to return to the Lac de Saint-Guérin car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 1,584 m - Car park - Lac de Saint-Guérin
  2. 1 : km 1.57 - alt. 1,571 m - Le Planay
  3. 2 : km 4.21 - alt. 2,117 m - Col de la Louze
  4. 3 : km 5.59 - alt. 2,419 m - Marlhonnays sign
  5. 4 : km 6.78 - alt. 2,683 m - Le Grand Mont.
  6. 5 : km 8.29 - alt. 2,371 m - Col de la Forclaz
  7. 6 : km 10.04 - alt. 1,990 m - Bottom of the valley
  8. 7 : km 10.4 - alt. 1,940 m - Chalets des Rognoux
  9. 8 : km 10.78 - alt. 1,871 m - Rognoux from below
  10. 9 : km 12.93 - alt. 1,567 m - Passerelle himalayenne du lac de Saint-Guérin
  11. S/E : km 14.33 - alt. 1,585 m - Car park - Lac de Saint-Guérin

Notes

(3) Marlhonnays sign: this sign indicates: Le Grand Mont 40 minutes away, the time is underestimated here.

Reviews and comments

4.8 / 5
Based on 8 reviews

Reliability of the description
4.8 / 5
Ease of following the route
4.5 / 5
Route interest
5 / 5
eveveni
eveveni

Overall rating : 4.7 / 5

Date of your route : Nov 09, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful, challenging hike with superb views. We did it with our two dogs, who are used to hiking. The first part is very green and family-friendly, with lots of streams, until you reach the Col de la Louze, where we met other people. The view from this pass is magnificent, with Mont Blanc on the horizon. We continued climbing up various plateaus with mini lakes, ideal for doggy breaks. The climb to Grand-Mont is definitely worth the detour as the 360-degree view is breathtaking, despite the fairly steep return trip. For sporty hikers! A picnic break is a must in this peaceful setting.

The rest of the descent is accompanied by views of Mont Blanc.

We were even lucky enough to see marmots in the mountain pastures.

Be careful, go to the right under the Forclaz ski lift, where you may have to climb back up! Just after point 5, do not follow the ski lift.

At the Alpage refuge, we had a pleasant encounter with the farmers, who helped us get back on the right track.

The section through the woods is quite steep and rough (about 1 hour).

The terrace at the car park with its view of the lake is a great place to rest your legs.

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User 18474894

Overall rating : 5 / 5

Date of your route : Aug 29, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Great hike! Easily accessible, I hadn't been to the mountains for years and this hike is perfect for getting a sense of immensity without the fear of falling. In my opinion, the Col de la Forclaz is the most beautiful part of the circuit! We couldn't reach the summit, which was only 100 metres away, because of the weather, but we'll be happy to go back. I highly recommend this hike.

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JFFAUGERAS
JFFAUGERAS

Thank you

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lemarcheur65
lemarcheur65 ★
• Edited:

Hello JFFAUGERAS
Thank you for your very useful comment.
I have annotated the hike.
The author has been notified.

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JFFAUGERAS
JFFAUGERAS

Overall rating : 5 / 5

Date of your route : Aug 04, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Nice loop. However, I should point out that the western shore of Lake St Guerin is closed to hikers by municipal decree due to the risk of landslides. The hike must therefore start and end on the eastern shore of the lake.

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achard
achard

Overall rating : 5 / 5

Date of your route : Nov 07, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A magnificent loop with no technical difficulties. Highly recommended.

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randobauju
randobauju

Overall rating : 4.3 / 5

Date of your route : Aug 11, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A good description with useful details and warnings (summit 40 minutes away! cairns and yellow markings; you need to be careful! Yes! ) One piece of information to note before setting off: the beautiful track that runs along the western shore of the lake is currently closed due to the risk of rock falls: there are large, clearly visible signs after you cross the dam and at the Col de la Louze junction on the way back. You have to go around again via the footbridge; it's longer and there's a slight incline, which is tough in the heat!

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lionel3938
lionel3938

Overall rating : 4.3 / 5

Date of your route : Jul 22, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

A beautiful hike, but beware of snow accumulation. In 2024, I couldn't make it to the summit

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Blin
Blin

A much longer hike, 17.3 km including the storm lakes, with an elevation gain of 1,603 m, and very demanding, especially the final stretch of the Grand Mont.
Nevertheless, the effort is rewarded with a superb 360⁰ view!
The route is well marked. Thank you for sharing this beautiful hike.

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Netra
Netra ★

Hello Blin, thank you for your feedback.

In order to assess your comment "much longer hike", we would need you to provide your route. On your page, there is a route recorded on 12/08/2023 at 09:29, which looks very similar to the hike you commented on: https://www.visorando.com/randonnee-/382...

If this is correct, your route is 17.3 km long and not 19.3 km as mentioned in your message. The difference with the published hike is mainly due to the return trip to the Lacs de la Tempête, which you mention, and also to a few twists and turns in your route.

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Blin
Blin

Overall rating : 5 / 5

Date of your route : Aug 14, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A much longer hike, 19.3 km including the storm lakes, with an elevation gain of 1,603 metres, and very demanding, especially the final stretch of the Grand Mont.
Nevertheless, the effort is rewarded with a superb 360⁰ view!
The route is well marked. Thank you for sharing this beautiful hike.

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389920169002
389920169002

Overall rating : 4.7 / 5

Date of your route : Sep 26, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Very beautiful route, varied, and with a permanent view of Mont Blanc

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