The art museum that bears Sid Richardson's name is dedicated to displaying his collection of Western paintings. On display are paintings by two of the most celebrated artists of the American West: Frederic Remington (1861-1909) and Charles M. Russell (1864-1926). Works by these two artists form the core of the collection, which includes early paintings by each artist, as well as later paintings produced at the height of their careers.
Russell was largely known as a painter of action, but in many paintings of Indigenous peoples, such as Grubpile (The Evening Pipe), an oil on canvas, he revealed a contemplative side. Remington's A Sioux Chief, a pencil and pastel on composition board, rather than being a portrait of a specific individual, is a tribute to the Sioux.