William Lake Provincial Park

William Lake Provincial Park is a provincial park located in the Rural Municipality of Morton, in southwest Manitoba on Turtle Mountain (49°02′28″N 99°58′23″W / 49.041°N 99.973°W / 49.041; -99.973). Its sister park, the much larger Turtle Mountain Provincial Park, lies to the west.

The park is centered on William Lake (49°02′24″N 99°58′37″W / 49.04°N 99.976944°W / 49.04; -99.976944). It is one of two lakes in Manitoba named William Lake; the other is located in Northern Manitoba near Little Limestone Lake.

Park amenities include a campground, a beach, and hiking trails.