Flat Reservoir   Be the first to submit input for Flat Reservoir. If you have info on Flat Reservoir, Blue Mountains, Crook County, Oregon please submit it here to improve this web site.          These outdoors activities are available near Flat Reservoir.   Public Lands Near Flat Reservoir: Cline Falls State Park, Oregon, 4 miles away Ochoco National Forest, Oregon, 35 miles away John Day Fossil Beds National Monument, Kimberly - OR, 39 miles away   Camp Grounds Near Flat Reservoir: Twin Springs Campground, Crook County, 1 miles away Lonesome Spring Campground, Crook County, 6 miles away