"Oh, You Cowgirl!" a documentary. Mabel Strickland, of Walla Walla, Wash., began her career in the early 1900s. She won big at rodeos, played in movies and has been inducted in the National Cowboy & Western Heritage Museum, Pendleton, and National Cowgirl halls of fame. She died of cancer in 1976. The Mabel Strickland Cowgirl Museum is in Cheyenne, Wyo.