Erebia discoidalis, the red-disked alpine, is a member of the subfamily Satyrinae of family Nymphalidae. It is found in North America from eastern Quebec, through northern Ontario (south to Sudbury), and the northern Prairies to northern British Columbia, the Northwest Territories, Yukon, and Alaska. It reaches just into the northern U.S. between Michigan and Montana, and also occurs in Asia, where it has been recorded from the Chukot Peninsula to the eastern Sayan Mountains and Amur. The habitat consists of large, open, grassy bogs and other areas with acidic soils.