Martin Lake is an endorheic freshwater lake in the West Chilcotin area of British Columbia, Canada, situated just north of the community of Tatla Lake, British Columbia. This small alkaline lake has no physical outflow (Martin Lake Creek flows underground) so the water level has been dropping slowly over time. Since the 1980s the lake has divided into two separate lakes with a land bridge between them. The area around Martin Lake is a popular cross country skiing spot with numerous trails linking downtown Tatla Lake and the school with Martin Lake.