Colwell Reservoir   Be the first to submit input for Colwell Reservoir. If you have info on Colwell Reservoir, Sheridan County, Nebraska please submit it here to improve this web site.          These outdoors activities are available near Colwell Reservoir.   Lakes Near Colwell Reservoir: Isham Reservoir, Sheridan County, 6 miles away   Public Lands Near Colwell Reservoir: Chadron State Park, Nebraska, 25 miles away Wind Cave National Park, Hot Springs - SD, 57 miles away Mount Rushmore National Memorial, Keystone - SD, 65 miles away Badlands National Park, Interior - SD, 66 miles away   Hotels Near Colwell Reservoir: Americas Best Value Inn Chadron, Chadron, 22 miles away Best Western West Hills Inn, Chadron, 22 miles away Patriot Inn, Hemingford, 42 miles away Alliance Hotel and Suites, Alliance, 46 miles away Holiday Inn Express ALLIANCE, Alliance, 47 miles away