Mackenzie River east into the Churchill River. The eastern portion of the Mackenzie basin is dominated by vast reaches of lake-studded boreal forest and includes many of the largest lakes in North America. By both volume and surface area, Great Bear Lake is the biggest in the watershed and third largest on the continent, with a surface area of and a volume of . Great Slave Lake is slightly smaller, with an area of and containing of water, although it is significantly deeper than Great Bear. The third major lake, Athabasca, is less than a third that size with an area of
Two Ocean Lake Ocean Lake only flows into Pacific Creek so the name is a misnomer. Two Ocean Lake Two Ocean Lake is located in Grand Teton National Park, in the U. S. state of Wyoming. The glacially formed lake is long and can be reached from a parking area adjacent to the lake. The Two Ocean Lake Trail is long and circles the lake passing through forests and clearings. The larger Emma Matilda Lake is one mile (1.6 km) to the south. Two Ocean Lake, in the northeastern portion of the park near Moran, was named for Two Ocean Pass about to