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.
Calculated time: 7h00[?] 
Distance : 12.9km
Vertical gain : 1168m
Vertical drop : 1168m
Highest point : 2160m
Lowest point : 1083m 
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.
(D) 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 :
D/A : km 0 - alt. 1083m
1 : km 1.28 - alt. 1433m - Tanay site access pass
2 : km 2.09 - alt. 1422m - Hamlet uphill from the lake - Lac de Tanay
3 : km 3.81 - alt. 1651m - Junction with trail
4 : km 4.59 - alt. 1772m - Bifurcation
5 : km 5.59 - alt. 1919m
6 : km 6.31 - alt. 2150m - Lac Léman
7 : km 6.44 - alt. 2154m - Summit - Grande Jumelle (la)
D/A : km 12.9 - alt. 1083m
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 (D) 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.
Visorando and this author cannot be held responsible in the case of accidents or problems occuring on this walk.
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.
12.02km
+1226m
-1219m
6h55
Difficult 
Starting point in Vouvry - Valais Passing through Tanay preserved site, and its lake, you'll climb to the summit offering a unique view point over Lac Léman and a panoramic view over the surrounding mountains.
A busy hiking trail with steep slopes but without any technical difficulty.
N.B. The calculated height difference is over estimated, it's actually closer to 1000 metres.
9.73km
+856m
-854m
5h15
Difficult
Starting point in Leysin - Vaud The Tours d'Aï and Mayen are twin peaks visible from afar. The Tour d'AÏ is slightly higher than its neighbour, and also visited more frequently. It's a progressive climb which offers an aerial tour at the very end. Amazing views of Lac Léman, le Chablais, les Dents du Midi and the Mont Blanc massif from the summit.
13km
+851m
-849m
6h10
Difficult
Starting point in Leysin - Vaud The Tours d'Aï and Mayen are twin peaks visible from afar. The Tour de Mayen is slightly lower than its neighbour, not as busy and provides a more wilderness setting. The climb is progressive with two stages, the Chalets de Mayen and Segray Lake. Just beneath the summit, a very clear view of Lac Léman, les Diablerets, le Chablais, les dents du Midi and the Mont Blanc Massif.
12.66km
+1128m
-1123m
6h50
Difficult
Starting point in Monthey - Valais An uphill hike taking you to the foot of the Eastern Peak (Cime de l'Est), eastern peninsular of "les Dents du Midi", with mind-blowing mountain view points and a panoramic view extending towards the Vaudois Alps. A challenging itinerary with a short aerial path through ridges.
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The GPS track and description are the property of the author.
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