The Kechika River, also historically known as Black's River, is a tributary of the Liard River, located in northern British Columbia, Canada. The river rises at the Sifton Pass and flows northwest and then east 230 kilometres to join with the Liard River near Fireside, British Columbia. The river drops approximately 610 metres in elevation and drains a total area of close to 2,700 square kilometres. The river winds its way through a wilderness area in the northern boreal mountains, including the Kechika Ranges (a subdivision of the Cassiar Mountains) and Western Muskwa Ranges (which are part of the northernmost Canadian Rockies), and forms part of the boundary between the Rockies the Cassiars in the portion of its course through the Rocky Mountain Trench, and winds through the Liard Plain in its lowermost, northern reaches.