Defeat Butte Reservoir   Be the first to submit input for Defeat Butte Reservoir. If you have info on Defeat Butte Reservoir, Malheur County, Oregon please submit it here to improve this web site.          These outdoors activities are available near Defeat Butte Reservoir.   Whitewater Near Defeat Butte Reservoir: Owyhee River, OwyheeCounty, 13 miles away       Class III - 36 miles long (Crutcher's Crossing to Three Forks)