Lac la Martre is the third largest lake in the Northwest Territories of Canada . It is located northwest of the Great Slave Lake . The lake is 265 m above sea level. Its water area is 1687 km², including islands, the total area is 1776 km². The place whatI located on the southeastern shore of the lake. The lake is drained from the Rivière la Martre east to the Marian River , a tributary of the Great Slave Lake. The administrative center of the Northwest Territories, Yellowknife , is 160 km to the southeast.
