Bull Lake is a lake in Sudbury District, Ontario, Canada. It is about 2,300 metres (7,546 ft) long and 860 metres (2,822 ft) wide, and lies at an elevation of 324 metres (1,063 ft) about 46 kilometres (29 mi) northeast of the community of Capreol and 62 kilometres (39 mi) west of the community of Temagami. The primary outflow is an unnamed creek to an unnamed lake on the Yorston River, a tributary of the Sturgeon River, between Long Lake upstream and Seagram Lake downstream.