This river receives much of its water from the Peel and Laird Rivers, while earlier it passes through Lake (*) Athabasca.
By navigating up the Finlay River, explorer Samuel Black discovered that this river's headwaters originate from Thutade Lake. After passing through the San Sault Rapids, it narrows to less than half a kilometer through a series of limestone cliffs known as the Ramparts. This river receives much of its water from the Peel and Laird Rivers, while earlier it passes through Lake (*) Athabasca. Known as Deh Cho, or "Big River," it also passes by the Fort Good Hope and Fort Simpson before entering into its large delta bounded by the Richardson Mountains and the Caribou Hills. Emptying into the Beaufort Sea in the Arctic Circle, this river is named after discoverer, who called it "Disappointment River" because it did not lead to the Pacific. For 10 points, name this longest river in Canada.
By navigating up the Finlay River, explorer Samuel Black discovered that this river's headwaters originate from Thutade Lake.
Mackenzie River [accept Deh Cho before it is read]