Blacktail Lake

Reservoir in North Dakota · 164 acres · near Williams County

Blacktail Lake has 1 boat ramp listed as public.

Past algal blooms

Harmful algal blooms reported on this water (state reports compiled by U.S. EPA): 2024 to 2026.

state reports compiled by U.S. EPA · checked October 18, 2026

Depth contours in feet from North Dakota Game and Fish (fieldwork 2020); deepest point about 36 ft. Lake levels and bottoms change; not for navigation.

Launches

Blacktail Lake Boat Launch in Williams County · Boat ramp · near Williams County