Exhibits of Indian artifacts, cowboy trappings, 19th century weapons, outlaw memorabilia. May 1- October 9: 9am - 4:00pm. Open Saturdays June - September. Closed for Winter. The museum is fully handicap accessible. The 18,000 square feet Museum is designed to house more than 20 exhibits, both temporary and permanent, in 11,000 square feet of gallery space. The Nelson Museum is dedicated to the preservation of fine Cowboy and Native American objects as well as fine Western art. Rodeo, cowboy and Native American objects comprise the largest part of the Museum's collection of more than 6,000 artifacts.