​NIPIGON [Neepigon, or Nepigon], a lake and river of Thunder Bay district, Ontario, Canada. The lake is 30 m. N. of the bay of the same name on Lake Superior, at an altitude of 852 ft. above the sea. It is 70 m. long and 50 m. wide; contains over loco islands, is very deep, and has a much-indented shore-line measuring upwards of 580 m. The river, which drains the lake, descends several hundred feet in the 40 m. of its course and is the largest stream flowing into Lake Superior. It is widely known for the excellence of its trout fishing.