I think there is nothing more beautiful than an alpine lake surrounded by alps.
And the Swiss have perfected building huge dams / lakes in the high Alps. Lac de Mauvoisin has been on my list forever. Today I finally climbed it.
Purists? You can start in Martigny, but the first 5 kms are on a very fast, nasty road. Or you can start in Sebrancher, but the next five kms are on fairly busy road.
Me? I started in Le Chable (the base of Verbier). From here it is 20 kms on quiet, unbelievably beautiful roads. Note, on the map (below) while descending, a well aimed right turn allows a descent on a superb, alternate road. (And if I had more ambition, from Lourtier, one can make a loop via Verbier – next year for me!).
The climb to Mauvoisin is quiet, scenic, at times steep, etc. Certainly possible for a road bike – but a little rough.
And as the video shows …. make sure you take the secret passage to get onto the dam and next to the lake!