Black Lake is a lake in the Hudson Bay drainage basin in Kenora District in Northwestern Ontario, Canada. It is about 2 kilometres (1.2 mi) long and 0.6 kilometres (0.4 mi) wide and lies at an elevation of 371 metres (1,217 ft), 13 kilometres (8.1 mi) northeast of Superior Junction and Highway 642, 4 kilometres (2 mi) southwest of McDougall Mills and 1.3 kilometres (0.8 mi) south of Rosnel. The primary outflow is an unnamed creek north to Botsford Lake on the Marchington River, which flows via the English River, the Winnipeg River and the Nelson River to Hudson Bay. The CN transcontinental rail line crosses the creek between Black Lake and Botsford Lake.