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 and the water level has been dropping slowly over time. Since the 1980s the lake has divided into two separate lakes with a land bridge betwe…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 and 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.