Flat Reservoir   Be the first to submit input for Flat Reservoir. If you have info on Flat Reservoir, Campbell County, Wyoming please submit it here to improve this web site.          These outdoors activities are available near Flat Reservoir.   Lakes Near Flat Reservoir: Garner Lake, Campbell County, 16 miles away   Public Lands Near Flat Reservoir: Devils Tower National Monument, Devils Tower - WY, 54 miles away   Camp Grounds Near Flat Reservoir: High View Mobile Home Park, Gillette, 9 miles away   Hotels Near Flat Reservoir: Fairfield Inn & Suites Gillette, Gillette, 10 miles away Country Inn & Suites By Carlson, Gillette, WY, Gillette, 10 miles away Holiday Inn Express Hotel & Suites GILLETTE, Gillette, 10 miles away Candlewood Suites GILLETTE, Gillette, 10 miles away Clarion Inn Gillette, Gillette, 10 miles away