Lac Tremblant is a 13 km glacially-formed lake that stretches north from the resort village, with clear water and mountain scenery on all sides. In summer, it's the main stage for watersports: kayaking, canoeing, paddleboarding, windsurfing, and swimming from public beaches at the resort's beach club.
Boat rentals are available at multiple points around the lake, and half-day paddling circuits around the bays give a completely different perspective on the mountain than you get from the slopes. Fishing is popular — the lake holds brook trout, smallmouth bass, and walleye. The eastern shore, accessed by a short drive or by boat, is quieter and less developed than the resort side.