The Whitemud Formation is part of the Edmonton Group. It rests conformably on the Eastend Formation in Saskatchewan and in the Cypress Hills area; on the Horseshoe Canyon Formation in the Drumheller area; and on the St. Mary River Formation in the Oldman River area. In southeastern Saskatchewan it is unconformably overlain by the Frenchman Formation; and in all other areas it is conformably overlain by the Battle Formation.