Horse Flat Reservoir   Be the first to submit input for Horse Flat Reservoir. If you have info on Horse Flat Reservoir, Malheur County, Oregon please submit it here to improve this web site.          These outdoors activities are available near Horse Flat Reservoir.   Public Lands Near Horse Flat Reservoir: Malheur National Forest, Oregon, 13 miles away Unity Lake State Park, Oregon, 24 miles away   Camp Grounds Near Horse Flat Reservoir: Hunter Campground, Malheur County, 2 miles away   Hotels Near Horse Flat Reservoir: Knights Inn Baker City, Baker City, 46 miles away Rodeway Inn Baker City, Baker City, 46 miles away Best Western Sunridge Inn, Baker City, 47 miles away Super 8 Baker City, Baker City, 47 miles away