Sidehill Reservoir   Be the first to submit input for Sidehill Reservoir. If you have info on Sidehill Reservoir, Steens Mountains, Harney County, Oregon please submit it here to improve this web site.          These outdoors activities are available near Sidehill Reservoir.   Hiking Trails Near Sidehill Reservoir: The Beef Trail, Harney County, 4 miles away       5 hiking miles, 644 feet elevation difference