McDade Reservoir   Be the first to submit input for McDade Reservoir. If you have info on McDade Reservoir, Steens Mountains, Harney County, Oregon please submit it here to improve this web site.          These outdoors activities are available near McDade Reservoir.   Hiking Trails Near McDade Reservoir: The Beef Trail, Harney County, 7 miles away       5 hiking miles, 644 feet elevation difference