Blackwater Falls State Park is located in the Allegheny Mountains of Tucker County, West Virginia, USA. The centerpiece of the park is Blackwater Falls, a cascade where the Blackwater River leaves its leisurely course in Canaan Valley and enters rugged Blackwater Canyon. It is among the most photographed venues in the state and appears on calendars, stationery, and advertisements. The river is named for its tannin-darkened water.