The 83rd Donkey Derby Days Festival. Cripple Creek’s premiere event, featuring donkey races, games and bizarre contests, a parade, live music and an overall celebration of the district’s heritage, is scheduled for June 28-29. Donkey Derby Days also will feature the debut of the Butte Theatre’s summer melodrama show, The Spoilers. For more information, see www.VisitCripplecreek.com.