Lac du Mont Charvin via Col des Porthets

A moderately difficult hike through the steep, rocky mountain pastures of Mont Charvin. From the Fontanettes car park in the commune of Le Bouchet, the climb takes you past the Chalet des Fontanettes and the Chalet de l'Aulp de Marlens, then through the valley to the Col des Porthets. From there, descend to join the path coming from Manigod and climb back up to the lake. The return journey follows the same route.

Details

316260
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 9.04 km
  • ◔
    Average duration: 4h 45 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 767 m
  • ↘
    Descent: - 769 m

  • ▲
    Highest point: 2,069 m
  • ▼
    Lowest point: 1,382 m

Photos

Description of the walk

On the access road to the Fontanettes chalet restaurant, park in the car park at the end of the paved section of road.

(S/E) From there, follow the track to the Chalet des Fontanettes. Shortly before the end of a wooded area, ignore a path coming from the left. At the next junction, turn left.

(1) When you reach the Chalet des Fontanettes, follow the track on the right, which winds its way up to the Chalet de l'Aulp de Marlens.

(2). From the chalet, follow the small path eastwards which joins the foot of the valley through the mountain pasture and begins to climb up the hillside.

(3) After an initial climb up the left side of the valley, at the fork, continue on the left-hand path (ignore the shortcut to the right that leads to Mont Charvin, which is slippery and very steep). Continue on the left side of the valley until you reach a flat area where there is a sign indicating the path to Mont Charvin.

(4) Ignore the path to Mont Charvin and turn left onto the western slope of Col des Porthets.

(5) When you reach the ridge, turn right (east; beautiful view of the Manigod valley). An almost flat traverse allows you to catch your breath before the final slope that leads to the pass, the highest point of the hike.

(6) From Col des Porthets, continue east-northeast, descend the switchbacks on the rocky slope and cross at the foot of a rock (possibility of snow until the end of July). The path, which is well marked but not shown on the 1:25,000 map (only visible when zooming in), leads you to the path that climbs up from Manigod.

(7) Continue eastwards to Lac du Mont Charvin, well protected by the surrounding ridges and peaks.

(8) Return via the same route, taking particular care on the descent after the Col des Porthets as the path is often slippery. This will take you back to the car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 1,386 m - Car park
  2. 1 : km 1.27 - alt. 1,481 m - Les Fontanettes
  3. 2 : km 2.23 - alt. 1,660 m - Aulp de Marlens
  4. 3 : km 3.02 - alt. 1,812 m - Stay on the left side of the valley
  5. 4 : km 3.21 - alt. 1,881 m - Chemin du Mont Charvin
  6. 5 : km 3.45 - alt. 1,958 m - Ridge
  7. 6 : km 3.78 - alt. 2,068 m - Col des Porthets (2072m)
  8. 7 : km 4.31 - alt. 1,997 m - Path from Manigod to the lake
  9. 8 : km 4.52 - alt. 2,013 m - Lac du Mont Charvin
  10. S/E : km 9.04 - alt. 1,387 m - Car park

Notes

Mountain boots and walking sticks are very useful, especially in wet weather.
In summer, there is a refreshment bar at the Chalet de l'Aulp de Marlens (2).

Worth a visit

The two chalets, Fontanettes and Aulp de Marlens, are very pleasant places to stop for a bite to eat on the way there, but especially on the way back.

Reviews and comments

4.7 / 5
Based on 14 reviews

Reliability of the description
4.6 / 5
Ease of following the route
4.6 / 5
Route interest
4.8 / 5
Stef74
Stef74

Overall rating : 4.7 / 5

Date of your route : Aug 25, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

As previously mentioned, take the path that climbs into the forest at the start, as it is much more pleasant.
Otherwise, it's a magnificent hike with some very pretty views, especially from the Col des Porthets.
If you set off early, you will have the chance to be (almost) alone in the world once you reach the lake and the ridges.

The hike gets busier towards the end of the morning (especially in summer) and you may encounter quite a few people on the way down.

Thanks for sharing!

Machine-translated

Mic Bravoure
Mic Bravoure

Overall rating : 4.5 / 5

Date of your route : Jun 18, 2025
Reliability of the description : Not used / Not applicable
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Superb hike in mid-June.
Be sure to take the path through the forest from the car park, which is very pleasant and preferable to the dusty track suggested.
On arrival, as already mentioned in other reviews, go around the lake on the right and follow the path to reach the ridges and discover a splendid view of the Mont Blanc range (the sky was clear for us that day).
You can have a picnic on your return to Aulp de Marlens and enjoy a drink.
Please note that after the Col des Porthets, on the descent before climbing back up to the lake, there was still snow when we passed. This is a tricky section if no one has passed before you to leave tracks. To get around it, you have to walk across a scree slope.
Thanks to the author for sharing! I'll add a few photos.

Machine-translated

Ce.li.ne
Ce.li.ne

Overall rating : 5 / 5

Date of your route : Sep 03, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful walk all along the way.
It's actually more pleasant to take the little path that climbs up to the right through the fir trees than the stony forest path.
At each stage, there is a new view of the different mountains. And you have to climb up to the ridge above the lake to see the Mont Blanc range (if it is not in the clouds, as it was on this particular day).

Machine-translated

Libellule🌸
Libellule🌸

Overall rating : 5 / 5

Date of your route : Sep 27, 2023
Reliability of the description : Not used / Not applicable
Ease of following the route : Not used / Not applicable
Route interest : ★★★★★ Very good
Very busy route : No

It is indeed much more pleasant to start off by taking the path that leads directly to the Aulp chalet, as the basic route leads to point 1 at Les Fontanettes and is a track.
The view is beautiful all along the way.
I also recommend taking the 20-minute walk above the lake to enjoy the magnificent view of Mont Blanc: there is a marked trail.
I used the GPX file, so I had no trouble finding my way.
thank you for this hike

Machine-translated

slegros
slegros
• Edited:

Overall rating : 5 / 5

Date of your route : Aug 11, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

One of the most beautiful (and quietest) places in the Aravis mountain range. The start (and end) of the route is more enjoyable if you go directly to the Aulp de Marlens chalet via the forest path that leaves from the car park and avoids Les Fontanettes. Once at the lake, don't hesitate to walk around the cirque: beautiful view of the lake in front of Charvin, then a very beautiful view of Mont Blanc and the Arly valley from the pass below the ridge of Mont Charvin. For the more experienced, it is possible to climb Mont-Charvin from this pass, then descend via the natural Charvin route to point 3.
The route is a round trip, but this is not too much of a problem as the scenery is worth seeing in both directions!
The Aulp de Marlens chalet is more than just a refreshment bar: you can eat and sleep there at reasonable prices and buy farm produce. On Thursdays at 2pm, the farmer organises tours of his farm (€7 with cheese tasting)

Machine-translated

Rhéa25
Rhéa25
• Edited:

Overall rating : 5 / 5

Date of your route : Jun 26, 2022
Reliability of the description : Not used / Not applicable
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

A superb hike.
The arrival at the lake is splendid and the tour along the ridges is well worth the detour, with breathtaking views of Mont Blanc.
We decided to descend by taking a circular route that passes by the path leading back to the 'Sous l'Aiguille' car park, where we turned off to climb back up via Le Freu to reach Les Fontanettes.
The climb up to Le Freu is intense and somewhat unstable, but with walking poles, it's no problem.
This makes for a more varied return journey and a gentle descent over the last 2 km, but above all, it offers a variety of views!
Doing the circular loop brings the hike to 10.7 km and maintains the 800 m elevation gain.

Machine-translated

jsaliou
jsaliou

Overall rating : 5 / 5

Date of your route : Aug 16, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

once you reach the lake, you can easily climb up to the ridges, which is what we did, but there were clouds and zero visibility

Machine-translated

Snoopy 2020
Snoopy 2020

Overall rating : 4 / 5

Date of your route : Jun 29, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A beautiful hike, but only for experienced hikers. The climb is long for an average walker who is not very fit. However, the return journey is a continuous descent. Otherwise, the scenery is very beautiful

Machine-translated

michelas
michelas

Overall rating : 4.3 / 5

Date of your route : Aug 05, 2019
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good

A very beautiful hike, done as a couple.
There is a steep climb before reaching the Col des Porthets, but the effort is rewarded when you arrive at the lake, which is very beautiful and well worth the climb!
We saw two marmots, but unfortunately not for very long because some young hikers were much too noisy for their liking...

Machine-translated

jbventoux
jbventoux

Overall rating : 5 / 5

Date of your route : Jul 27, 2017
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

A superb hike with the family (a 12-year-old boy and an 8-year-old girl)
No particular difficulties along the route, and to make the hike easier, we parked directly at Les Fontanettes
The views are magnificent and marmots accompanied us on the climb.
On the ridge, we found Mont Blanc hidden beneath the clouds. What a shame!

Machine-translated

dudunad
dudunad

Overall rating : 4.3 / 5

Date of your route : Jul 12, 2017
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good

a very beautiful hike, with marmots and bearded vultures to boot!

Machine-translated

pasala
pasala

Overall rating : 5 / 5

Date of your route : Jul 17, 2017
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

A very beautiful walk, but perhaps not recommended in June due to snowfields

Machine-translated

cathy746
cathy746

Overall rating : 4.3 / 5

Date of your route : Jun 27, 2017
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good

A very beautiful parish-specific to Brittany hike with stunning views as you circle the lake along the ridge. You can actually climb directly up the forest path that leads straight to the Chalet de l'Aulp de Marlens, which is nicer and partly through the woods.
The path after the Col du Porthets, with its hairpin bends on the stony slope, is not easy to navigate and requires careful footing.
Worth doing again

Machine-translated

brive73
brive73

Overall rating : 4.7 / 5

Date of your route : Jul 04, 2016
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

To make the hike more enjoyable, you can walk directly from the car park along a footpath to the Chalet de l'Aulp de Marlens.

Once you reach the lake, continue to the ridge for one of the most beautiful views of Mont Blanc.

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.