Castle Butte is a 70-metre high (200 ft) sandstone and clay formation located in the heart of the Big Muddy Badlands. Its prominent position on the flat valley floor made it a landmark that was used for navigation by Indians, early surveyors, North-West Mounted Police patrols, outlaws and settlers.

Castle Butte and the Big Muddy Badlands are located a short drive to the south east of Rockglen.