Roundup Lake   Be the first to submit input for Roundup Lake. If you have info on Roundup Lake, Sand Hills, Garden County, Nebraska please submit it here to improve this web site.          These outdoors activities are available near Roundup Lake.   Hotels Near Roundup Lake: Holiday Inn Express ALLIANCE, Alliance, 37 miles away Alliance Hotel and Suites, Alliance, 37 miles away Budget Host Platte Valley Inn, Julesburg, 42 miles away Days Inn Sidney, Sidney, 49 miles away Americinn - Sidney, Ne, Sidney, 50 miles away