O'Neil Lake   Be the first to submit input for O'Neil Lake. If you have info on O'Neil Lake, Sheridan County, Nebraska please submit it here to improve this web site.          These outdoors activities are available near O'Neil Lake.   Public Lands Near O'Neil Lake: Chadron State Park, Nebraska, 39 miles away   Hotels Near O'Neil Lake: Alliance Hotel and Suites, Alliance, 14 miles away Holiday Inn Express ALLIANCE, Alliance, 14 miles away Patriot Inn, Hemingford, 29 miles away Best Western West Hills Inn, Chadron, 43 miles away Americas Best Value Inn Chadron, Chadron, 44 miles away