Black Butte Reservoir   Be the first to submit input for Black Butte Reservoir. If you have info on Black Butte Reservoir, Malheur County, Oregon please submit it here to improve this web site.          These outdoors activities are available near Black Butte Reservoir.   Whitewater Near Black Butte Reservoir: Owyhee River, MalheurCounty, 11 miles away       Class III-IV(V) - 37 miles long (Three Forks to Rome) Owyhee River, -blank-County, 12 miles away       Class III+(V+) - 65 miles long (Garat Crossing to Three Forks) Owyhee River - North Fork, OwyheeCounty, 18 miles away       Class III-IV - 18 miles long (Off Mud Flat Road to Three Forks)