Derek Hersey died on 28 May 1993 in an accident while soloing the Steck-Salathé Route without protective gear, on Sentinel Rock in Yosemite National Park. He fell several hundred feet to his death.
Derek Hersey lost his life on 28 May 1993 when he attempted to climb the Steck-Salathé Route alone and without safety gear, resulting in a fatal fall from Sentinel Rock in Yosemite National Park.