Kakisa River a while, then turns east, where it builds a complex lake and channel system before it empties into the Tathlina Lake at its western extremity. It flows out the north side of the lake and continues north, receives the waters of Gull Creek, then flows into the Kakisa Lake at its southern shore. It flows out at the eastern side of the lake, drops through the Lady Evelyn Falls before it is crossed by the Mackenzie Highway. It continues northwards, then empties into the Mackenzie River, downstream from the Great Slave Lake, at an elevation of . Kakisa River The
Mackenzie River watershed drains about 20 percent of Canada. It is the largest river flowing into the Arctic from North America, and including its tributaries has a total length of , making it the thirteenth longest river system in the world. Through its many tributaries, the Mackenzie River basin covers portions of five Canadian provinces and territories – British Columbia (BC), Alberta, Saskatchewan, Yukon, and Northwest Territories. Thutade Lake, in the Northern Interior of BC, is the ultimate source of the Mackenzie River via the Finlay–Peace River system, which stretches through BC and Alberta. The Athabasca River originates further south, in Jasper