State Line Reservoir   Be the first to submit input for State Line Reservoir. If you have info on State Line Reservoir, Malheur County, Oregon please submit it here to improve this web site.          These outdoors activities are available near State Line Reservoir.   Whitewater Near State Line Reservoir: Owyhee River, -blank-County, 8 miles away       Class III+(V+) - 65 miles long (Garat Crossing to Three Forks) Owyhee River - North Fork, OwyheeCounty, 8 miles away       Class III-IV - 18 miles long (Off Mud Flat Road to Three Forks) Owyhee River, MalheurCounty, 9 miles away       Class III-IV(V) - 37 miles long (Three Forks to Rome)