Atlin Lake is a
lake in northwestern
British Columbia and is that province's largest natural lake, covering 300 sq mi (780 km
2). The northern tip of the lake is in
Yukon, as is
Little Atlin Lake. However, most of the lake lies within the
Atlin District of British Columbia. Atlin Lake is considered the source of the
Yukon River although it is actually drained via the short Atlin River into
Tagish Lake.