Lac de la Portette

Lac de la Portette is a beautiful hiking destination in the Beaufortain, at the foot of the Grande Pareï cliff. And as I've always preferred loops to round trips, the Col du Mont Rosset and the return via the Balme refuge offer a nice bonus with views of the Pierra Menta, an iconic peak if ever there was one.

Details

63
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  • Walking
    Activity: Walking
  • ↔
    Distance: 11.30 km
  • ◔
    Average duration: 5h 25 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 774 m
  • ↘
    Descent: - 766 m

  • ▲
    Highest point: 2,358 m
  • ▼
    Lowest point: 1,595 m

Photos

Description of the walk

(S/E) Departure from the Forand car park.

(1) Instead of heading towards the bottom of the valley (north), climb up to the left (west) towards a few houses. The trail then climbs steeply through the forest. Higher up, it joins a flat path. Continue along the uphill trail until you reach the track that leads to the Mont Rosset mountain pasture.

(2) Follow the trail that crosses the track in places and reach the mountain hut.

(3) From there, take the path on the left that climbs back up towards the Col du Mont Rosset.

(4) Further on, leave this path to the left (west) and climb up to Lac de la Portette (no signposts, check the route on the map carefully).

(5) From the lake, there is a beautiful view of the Vanoise peaks. To reach the Col du Mont Rosset from the lake, there are two options (see the alternative in the Practical Information section).
This route should be avoided in bad weather, especially fog.
Head east off the trail (this is the route marked on the map), passing two small lakes, and rejoin the trail to the pass.

(6) Take the pass trail on the left (north). You will quickly reach the Col du Mont Rousset.

(7) The descent from the pass (to the north-east) is sometimes a little steep, but you will quickly reach the Refuge de la Balme.

(8) From the refuge, descend via theGR® trail that heads east.

(9) From elevation 1928, the trail descends the valley to the south. Be careful at elevation 1701.

(10): Leave theGR®, cross the stream via the small bridge and continue south to reach the car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 1,595 m - Forand car park
  2. 1 : km 0.12 - alt. 1,608 m - Mont Rosset mountain pasture trail
  3. 2 : km 1.55 - alt. 1,940 m - Cut across the track
  4. 3 : km 2.48 - alt. 2,110 m - Chalet du Mont Rosset
  5. 4 : km 3.37 - alt. 2,192 m - On the left
  6. 5 : km 4.4 - alt. 2,334 m - Lac de la Portette
  7. 6 : km 5.37 - alt. 2,326 m - GRP
  8. 7 : km 5.6 - alt. 2,333 m - Col du mont Rosset
  9. 8 : km 7.09 - alt. 2,016 m - Refuge de la Balme
  10. 9 : km 7.72 - alt. 1,931 m - Elevation 1928
  11. 10 : km 9.53 - alt. 1,699 m - Elevation 1701
  12. S/E : km 11.3 - alt. 1,595 m - Forand car park

Notes

In summer, you can park at the Forand car park, but in winter the road is closed well before the start of the cross-country ski trails.

Alternative
(5) Either retrace your steps and find the path to the pass where you left it (4).
In both cases, take the pass trail (6) on the left (north). The pass (7) is quickly reached.

 Always be cautious and plan ahead when you're outdoors. Visorando and the author of this route cannot be held responsible for any accidents occurring on this route.

The GR® and PR® markings are the intellectual property of the Fédération Française de Randonnée Pédestre.

Reviews and comments

4.6 / 5
Based on 27 reviews

Reliability of the description
4.5 / 5
Ease of following the route
4.4 / 5
Route interest
4.7 / 5
Pierrot
Pierrot ★

Thanks for the feedback. There have indeed been some roadworks and changes to the signposting since I mapped out this route 15 years ago. I'll have to find the time to go back and update it...

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User 5869514

Overall rating : 4.3 / 5

Date of your route : Jul 27, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful loop that I have already done twice. There are a few changes to take into account with regard to the route.
In the forest, there is a sign indicating that the path has collapsed. It is indeed better to go around it via the track.
The climb to the lake from the Mont Rosset chalet is after the fork that leads to the Col du Mont Rosset, taking the path that runs along the stream on the left as you climb (not on the right as shown on the map). Just follow the clearly visible mountain/lake logo.
To reach the pass, avoid going off-trail. It's not very pleasant. There is now a very beautiful balcony trail, still marked with the same mountain/lake logo. You can reach it by leaving the lake and staying to the left of the stream as you descend. The rest of the tour is very beautiful and easy. Stops at the lake, stop at the refuge... magnificent..

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ChZambaux
ChZambaux

Overall rating : 4.7 / 5

Date of your route : Aug 31, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful hike on a sunny Saturday morning with lunch at the Balme refuge and return to the car park early enough to enjoy the last day of August.
It is recommended to do this hike in the suggested direction, as otherwise the climb to the Balme refuge on the track would be a bit tedious, whereas the path below Mont Rosset is very pleasant.

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muse_88_
muse_88_

Overall rating : 4.7 / 5

Date of your route : Aug 26, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Hello, a really beautiful hike. We did it in the fog in the morning, with a sea of clouds all the way to the lake, then it cleared up completely with a big blue sky at the lake. There are lots of marmots and cows in the mountains at the moment, and you are accompanied all the way by the tinkling of bells. The lake is very clean, with clear, pure water, a real treat, with a beautiful view of the Vanoise National Park mountains.
The hike isn't too difficult, except for a little bit at the beginning. It's relatively accessible. Don't hesitate to stop for a drink at La Balme, the staff are very welcoming.
A hike to be repeated

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BramPeeters
BramPeeters

Overall rating : 4 / 5

Date of your route : Jun 01, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

I did the hike in the opposite direction, but the section in front of the refuge (8) was still snow-covered, so the climb was quite difficult. I skipped the detour to the lake because I couldn't find a safe path, I was already quite exhausted, and in any case, there probably wasn't a lake . I think it would have been easier in the other direction since the snow on that side only started halfway between 3 and 4 (so less climbing in the snow and descending in the snow is easier).

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Didier B3.
Didier B3.

Overall rating : 4.3 / 5

Date of your route : Nov 03, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Hike completed on 21 September.
The route was straightforward, except from the lake to the pass. We went straight ahead, encountering quite a few bumps and tricky descents that we could have avoided.
Very pretty scenery.

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YOKE
YOKE

Overall rating : 5 / 5

Date of your route : Sep 10, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : Not used / Not applicable
Route interest : ★★★★★ Very good
Very busy route : No

We did this hike in the opposite direction to the suggested route and didn't regret it, as the climb is more gradual this way. What a surprise when we arrived at the lake: there was a herd of beautiful cows, 197 in total! We're more used to seeing ibex or chamois when we arrive!
I highly recommend it because the view of Mont Pourri facing the lake is magnificent, as is the entire valley.
On the way down (in reverse), we also saw some marmots racing each other.
The descent through the woods (about an hour) was very enjoyable given the heat of the afternoon.

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ecollain
ecollain
• Edited:

Overall rating : 4.5 / 5

Date of your route : Aug 21, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : Not used / Not applicable
Route interest : ★★★★★ Very good
Very busy route : Yes

We took a few liberties with the itinerary. At the start, we went straight up into the forest along a steep path. Then we took a path on the left for the final climb to the lake (marked with symbols representing a mountain and a lake, less steep than the path in the itinerary). Finally, we didn't cross over to the Rosset Pass but took the trail on the itinerary to reach point 4 and then climbed up to the pass.
A very beautiful hike, but it can get crowded, so it's best to leave early to enjoy the lake in peace.

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marcheurs07
marcheurs07

Overall rating : 4 / 5

Date of your route : Aug 28, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

nice hike. Quite a steep climb to reach the lake. From the lake, the route to Col Mont Rosset is not very clear. After the Balme refuge, the 4x4 track is not very interesting.

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renaud78
renaud78
• Edited:

Overall rating : 5 / 5

Date of your route : Oct 31, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

A superb walk through magnificent countryside.
Quite steep to reach the pass.

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dedetoine
dedetoine

Overall rating : 5 / 5

Date of your route : Jul 20, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

This hike is beautiful, starting with a slightly steep forest crossing, followed by beautiful landscapes all the way to Lake Portette.
The descent is pleasant until you reach the Balme refuge. After that, it's a little less enjoyable on the 4x4 track. But overall
it's very good.

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Tévy
Tévy

Overall rating : 5 / 5

Date of your route : Jun 16, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

With snow still very much present at this time of year, we didn't dare venture beyond certain trails and so we made a round trip to the lake. It was certainly frustrating not to be able to complete the entire loop! However, the hike was still magnificent, with spectacular scenery. I would definitely recommend it

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KatyetXtof
KatyetXtof

Overall rating : 4 / 5

Date of your route : Aug 08, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A little-used trail with varied landscapes, starting with an uphill climb through the forest, then alpine pastures and wilder landscapes after the lake, continuing on to the Col de Charbonnière: a beautiful area with small lakes. However, the descent through the scree is not well marked and somewhat slippery
the return on the 4x4 track from the Balme refuge is long and not very pleasant.
In summary, a very beautiful start but an uninteresting end

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Emmanuelle Fontaine
Emmanuelle Fontaine

Overall rating : 5 / 5

Date of your route : Jul 18, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Superb hike!!!
Worth noting (because it's very rare), this hike is beautiful from start to finish and the trails are pleasant to walk on (there's a short climb up to the lake and a fairly steep descent after the pass). To leave the lake, it's easy to find the small path that joins the GR without having to go back down the way you came up.
Very beautiful flora, magnificent mineral landscapes, no wildlife.

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JFC73
JFC73

Overall rating : 4 / 5

Date of your route : Jul 25, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

Although it's not the southern motorway, the route isn't deserted. You still need a bit of stamina to finish the loop without being exhausted, but the beauty of the landscapes attracts people...

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