Garry Lake is a lake in sub-Arctic Kivalliq Region, Nunavut, Canada. As a portion of the Back River waterway, Garry Lake originates directly east of Lake Pelly and drains to the east by the Back River. A set of rapids separate Buliard Lake from Garry Lake. Two other sets of rapids separate Garry Lake's three sections which are also differentiated by elevation. Garry Lakes are isolated from nearby communities.

The Back River, formerly Backs River, is the 20th longest Canadian river and is located in the Northwest Territories and Nunavut. It rises at an unnamed lake in the North Slave Region of the Northwest Territories and flows more than 974 km (605 mi) mostly through the Kivalliq Region, Nunavut, to its mouth at the Arctic Ocean in the Kitikmeot Region of Nunavut.