The Friendship Tower on Mount Roosevelt was constructed between March and July 1919 through the efforts of Seth Bullock, a lawman, rancher, entrepreneur, and second Forest Supervisor of the Black Hills National Forest, to commemorate the life and death of his personal friend Theodore (Teddy) Roosevelt. Financial support came from the Society of Black Hills Pioneers, and architectural plans were developed by C.E. Dawson and H.S. Vincent of Deadwood, South Dakota. On July 4, 1919, Bullock saw his dream fulfilled with the dedication of the Mount Roosevelt Memorial, where guest speakers included South Dakota Governor Peter Norbeck. Bullock died three months later in September and was buried above Deadwood Cemetery on Mount Moriah, where he would have an unimpeded view of Mount Roosevelt. In 1966, the Society of Black Hills Pioneers deeded Mount Roosevelt to the United States Forest Service, and in December 2005 the site was placed on the National Register of Historic Places for its unique architecture and workmanship. The site is also significant for its association with Bullock and Roosevelt as prominent figures in the conservation movement, federal land management, and local, regional, and national history. Resembling a medieval castle, the native-stone tower stands 31 feet tall with a 12 foot diameter on a 16-square foot base; twenty steps and an iron handrail spiral up the inside wall to a wood-planked viewing platform enclosed by a 3-foot flared parapet wall, and eight stone steps leading to the door were removed in 1974.