It is possible to fish at the "Lac des Vaux" situated at 2543m of altitude above La Tzoumaz and Verbier.
You can drive up to La Croix de Coeur and walk from there. It will take approximitly 1h30
Or you can walk from La Tzoumaz, but this will take you longer and includ a hike up; 3h00
Opening of the season begining of June.
Fishing permits are sold at the tourist office of La Tzoumaz:
Chf 30.- a day
Chf 50.- for 2 conscutive days.