La Grande Jumelle

A not too busy hike up to a summit offering a vast panoramic view. A relatively challenging route with some aerial passages requesting a certain sense of itinerary at times. The beginning of the hikes passes through Tanay site and its lake.

Technical sheet

105261
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  • Walking
    Activity: Walking
  • ↔
    Distance: 13.03 km
  • ◔
    Average duration: 7h 05 
  • ▲
    Difficulty: Difficult

  • ⚐
    Return to departure point: Yes
  • ↗
    Vertical gain: + 1,167 m
  • ↘
    Vertical drop: - 1,167 m

  • ▲
    Highest point: 2,178 m
  • ▼
    Lowest point: 1,081 m

Photos

Description of the walk

Parking available at the place called Le Flon's converted car-park.at the top of Miex village. You can take Miex road from Vouvry, a commune located between Le Bouveret and Monthey.

(S) At the far end of the car-park, take the ‘‘chemin des chevriers’’ trail to the right heading towards Tanay (sometimes spelt Taney). Most of the time under forest cover, the trail heads upwards with a few bends sticking to an overall north-west direction. You'll come across a paved road which also leads up to Tanay. A bit further up, you'll find a road, take it to the left over a few metres leaving it at a turn and crossing over a small dip at the end of which you'll find the road again. Take the road to the left until you get to the pass which leads to Tanay.

(1) Stick to the road which heads slightly downhill with a beautiful view of Tanay Lake to the right-hand side. Once you reach the "heart" of the hamlet, you'll come across "Le Grammont" restaurant.

(2) Take the trail heading west towards Au de Tanay (sign). After a couple of hundred metres, leave the trail to follow a small path to the left. Cross a river heading gently up the small valley along the right side of the river bank. After a few turns, you'll reach a trail.

(3) Take the trail to the left and keep heading west.

(4) Shortly before reaching old chalet ruins, take a trail which goes right at a sharp turn. Follow this trail which then steers left, passes in front of a chalet reaching a place called La Combe at the far end of a glacial cirque (small lake or pond depending on the season).

(5) Start the climb up the cirque's northern slope. There are only faint traces of the trail so you'll need to figure out the windy itinerary for yourself which on a very steep slope varying between grass and rhododendrons. You need to reach the north ridge heading right at the end (east), meaning towards La Grande Jumelle (if you go left, you head towards Gardy).

(6) Once you reach the ridge, head east. Get across the rocky outcrop with no real technical difficulty. Keep heading east on the rocky ridge with aerial passages at times. You'll then reach the summit.

(7) The trip back is the same way you came in on.

Waypoints

  1. S/E : km 0 - alt. 1,081 m - Le Flon - Car park
  2. 1 : km 1.3 - alt. 1,442 m - Col de Tanay
  3. 2 : km 2.12 - alt. 1,424 m - Hamlet upstream of - Lac de Tanay
  4. 3 : km 3.81 - alt. 1,638 m - Junction with the runway
  5. 4 : km 4.59 - alt. 1,757 m - Bifurcation
  6. 5 : km 5.58 - alt. 1,922 m - La Combe
  7. 6 : km 6.36 - alt. 2,172 m - Summit ridge - View of the - Lac Léman
  8. 7 : km 6.52 - alt. 2,174 m - Grande Jumelle (la)
  9. S/E : km 13.03 - alt. 1,081 m - Le Flon - Car park

Practical information

Allow for 3 to 4 hours hike to reach the summit without any stops.

"Alternative" -- To get to Tanay, you can also take the paved road which starts near the car park (S) which the trail meets up with (see above). Vehicle access being strictly regulated, the road is not busy at all. The slope is steep weather you take the road or the trail.

Hiking gear and shoes a must.
Water available at Tanay, there's also food and refreshments and the opportunity to stay overnight.

A map is necessary (at least the one attached to this description). A compass is always handy... La Grande Jumelle is also called "Grande Séreu". However this typonym is barely used nowadays but can be found in certain documents.

In the nearby area

In the summer, you can swim in Tanay Lake as long as you can handle the low temperature, not above 15°...

Once you've left the trail (4), the hike runs through a fairly wild setting. Take advantage of a wide panoramic view over the Chablais peaks, Dents du Midi and Mont Blanc Mountain from the summit.

Reviews and comments

4.2 / 5
Based on 7 reviews

Reliability of the description
4 / 5
Clarity of route map
3.8 / 5
Route interest
4.9 / 5
chvielliard
chvielliard
• Last modified:

Overall rating : 4.7 / 5

Date of walk : May 02, 2025
Reliability of the description : ★★★★★ Very good
Clarity of route map : ★★★★☆ Good
Route interest : ★★★★★ Very good
Busy trail : No

A 35-minute ascent to Taney... fast mode.
Then you follow the stream in the valley, crossing a few residual snow flows. The path up to the grande jumelle is not signposted. So you have to follow the (re-established) signs for the Combe, which leads to the mountain pasture on the edge of the Combe... and the habitat of a few marmots. The path leading to the Grande Jumelle is not very visible, but trail runners have left visible traces. A few rock-climbing sections on the way up to the antenna... but under the approving eyes of a chamois ahead of us on the path. The view of Grammont, Lac de Taney and Lake Geneva is amazing. Personally, I can understand why it's not signposted, as the path is steep and requires confidence and concentration... just the right amount of mountaineering!

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MIDG1951
MIDG1951

Overall rating : 4.3 / 5

Date of walk : Jul 15, 2019
Reliability of the description : ★★★★☆ Good
Clarity of route map : ★★★★☆ Good
Route interest : ★★★★★ Very good

Nice walk but lack of signposts from the village of TANAY no signpost indicates the direction of La Grande Jumelle and there is no signpost at the place called La Combe about 50 metres after the farm because the path goes straight on when you should turn right (there is a small stone pyramid as a signpost) for the rest it is an excellent walk not very difficult.

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champagnole
champagnole

Overall rating : 5 / 5

Date of walk : Oct 14, 2017
Reliability of the description : ★★★★★ Very good
Clarity of route map : ★★★★★ Very good
Route interest : ★★★★★ Very good

parish specific to Brittany, very busy at Tanay lake but very quiet at the summit of the grande jumelle

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DomPian
DomPian

Overall rating : 4.3 / 5

Date of walk : May 26, 2017
Reliability of the description : ★★★★☆ Good
Clarity of route map : ★★★★☆ Good
Route interest : ★★★★★ Very good

A magnificent hike, which I highly recommend! You have to go all the way to the summit - the reward is exceptional!
It's a long hike (from the Mieix car park) but a very easy one until the climb after the rocky outcrop above the Chalet de la Combe. I followed the path to the right, heading north-east, as indicated on the topography. The trail is not obvious on the grassy final slope, and there are no signs (cairns, no markings). The final section after the antenna is aerial, so please don't be faint-hearted... But the views are breathtaking!
The only snag: the tarmac section before the ascent to the Chalet de la Combe - what a shame!... Unfortunately, this is often unavoidable in Switzerland!

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Netra
Netra ★

Hello,

The route has been changed to take the path that runs east-north-east after the chalet, thus avoiding the unpleasant climb up the lawns of the glacial cirque.

The description has been adapted.

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Netra
Netra ★

Hello kador and thank you for your feedback!

Just to make sure I've understood you correctly: did you follow the entire itinerary as it appears in the description, or did you follow the path that goes off to the right when you reach the bottom of the glacial cirque, as recommended by previous hikers? Thank you in advance.

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kador
kador

Overall rating : 4.5 / 5

Date of walk : Sep 24, 2016
Reliability of the description : ★★★★☆ Good
Clarity of route map : N/A
Route interest : ★★★★★ Very good

Same comment as PLB38, you just have to be careful after the Chalet de la Combe, but there are cairns. The path is well marked after that, so there's no risk of getting lost. We were surprised in a good way, as we were expecting to struggle up the slope, clinging to tufts of grass. The only difficulty was in the last few metres between the weather marker and the summit, where you had to put your hands down a bit and possibly pull out a small rope to belay sensitive people. We came back down the same way after checking out the possibility of descending via the ridge, which we found to be an exposed descent.Superb hike...

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Netra
Netra ★

Hello Plb38,

Thanks for your feedback. Another hiker made the same comment as you: take the path on the right rather than going up the cirque.

I'm going to change the route and the description accordingly.

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Plb38
Plb38

Overall rating : 4.3 / 5

Date of walk : Sep 10, 2016
Reliability of the description : ★★★★☆ Good
Clarity of route map : ★★★★☆ Good
Route interest : ★★★★★ Very good

Superb hike, beautiful scenery and very varied paths!
I would add one more indication about the route.
When you get to the Combe refuge, take the path that goes up behind the little chalet on the right rather than following the path up the north face of the cirque. The climb without a path is really hard and the top is quite steep as it is on the ridge.
The path is much safer and offers a beautiful view over the valley.

Pierre-Loïck

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Netra
Netra ★

Hello alain4999,

Thank you for your feedback and I'm sorry that you didn't find the description sufficient.

The itinerary I described does indeed involve progressing off-piste on the steep slopes of an ancient glacial cirque in order to reach the ridge linking the Grand Jumelle (East) to Mont Gardy (West). It is possible that in this year of exceptional weather (lots of snow late in the spring, rain until early summer) the vegetation has been "cumbersome".

The alternative is undoubtedly the track you found but which, in my opinion, is not easy to find on the way up (much easier to find on the way down).

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alain4999
alain4999

Overall rating : 2.7 / 5

Date of walk : Aug 03, 2016
Reliability of the description : ★★☆☆☆ Disappointing
Clarity of route map : ★★☆☆☆ Disappointing
Route interest : ★★★★☆ Good

Hello,
I've downloaded the GPS track
Up to the Combe mountain pasture, the route described is good. After that, if you follow the GPS track, you end up on very steep slopes and in vegetation that is too high (at the beginning of August) to make any headway. So we gave up about 100 m above the small lake. Once back at the small lake, and after a hundred metres or so in the grass (on the right 50 m after the chalet), we found a good track that took us to the summit. The route is very well described on the following link (blog):
http://lesresy.over-blog.com/2014/11/gra...
Seen from the weather antenna near the summit, the route corresponding to the GPS track seems almost impossible to me....
It's a shame there aren't any photos to show the author's route along the ridge and the spur.
Sincerely
Alain4999

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