 Though considered an expert horsewoman, Mead was killed on her 61st birthday in an accident while working cattle on leased land in Grand Teton National Park near the Mead Ranch in Spring Gulch.She was thrown by her horse, which then collapsed upon her.In addition to Governor Matt Mead, who is also a former U.S. attorney in Cheyenne, Mead's other children are Bradford Scott "Brad" Mead (born July 24, 1957) and Muffy Mead-Ferro, an author in Salt Lake City, Utah.