Dauphin Lake is a large, shallow lake located east of the community of Dauphin in the Parkland Region of Manitoba, Canada. The lake covers over 200 square kilometres, and its notably shallow depth is one of its defining characteristics — paddlers and boaters new to the lake should exercise caution, as shallow areas are found throughout. In 1964, the lake was dammed at Terin's Landing near the mouth of the Mossy River, a ten-bay dam with a concrete stop log mechanism and a fish ladder.

The western shore is lined with sandy beaches, making it the more accessible and developed side of the lake. Rainbow Beach Provincial Recreation Park on the southwestern shore is the primary hub for paddlers, offering boat launches, campsites, and a sandy beach. Other named beaches around the lake include Sifton, Stoney Point, Dauphin, and Ochre Beaches. On the eastern side, Methley Beach near the town of Ste. Rose du Lac also has a boat launch. Equipment rentals are available at Dauphin Lake, and the town of Dauphin, roughly 15 kilometres away, provides additional accommodation options for those who prefer not to camp.

Paddling activities on the lake include canoeing and kayaking, and the lake is described as offering family-friendly conditions. The Valley and Wilson Rivers connect to the lake and provide additional paddling and shore-fishing opportunities. Summer is the primary paddling season, with swimming, water skiing, and windsurfing also common during those months. Winter use shifts to ice fishing and snowmobiling.

Dauphin Lake is well regarded as a walleye fishery, and fishing activity on the water is significant. The lake is managed under conservation limits, with a walleye limit of four fish and a slot size of 45 cm and under. Other species present include northern pike, yellow perch, whitefish, bullheads, and common carp. Paddlers sharing the water with motorized boats — including wake boats and tubing craft — should be aware that recreational powerboat traffic is common, particularly in summer.