Stump Reservoir   Be the first to submit input for Stump Reservoir. If you have info on Stump Reservoir, Owyhee County, Idaho please submit it here to improve this web site.          These outdoors activities are available near Stump Reservoir.   Whitewater Near Stump Reservoir: Owyhee River, OwyheeCounty, 11 miles away       Class III - 36 miles long (Crutcher's Crossing to Three Forks) Owyhee River - South Fork, OwyheeCounty, 13 miles away       Class II-III - 36 miles long (El Paso pipeline)