Champex is a small lakeside village along the both Haute Route and TMB in Valais, Switzerland. It’s a tiny village with just a couple of shops and a handful of small hotels, and it makes a very pleasant stop. There is a forested pedetrian walkway around the lake, and paddleboat rentals are available if you would like to go out on the lake. There are quite a few trails around town, some of them along pretty irrigation channels (called bisse or Suonen) with abundant blueberries.
A chairlift from the edge of town can take you 700 meters into the mountains to a place call la Breya, where you can take a rugged high-level walk to the glacier-hugging d’Orny hut. The Fenetre d’Arpette is a popular pass (an optional variant along both the Haute Route and Tour du Mont Blanc hikes) that can also be done as a dayhike from Champex.