Muddy or Heóvonėheo'hé'e (Muddy Creek. Lit: yellow-paint-creek) is a census-designated place (CDP) in Big Horn County, Montana, United States and home to the Heóvonėheo'hé'etaneo'o or Heóvonêheo'he'é-taneno (″Muddy Creek people″) Cheyenne people. The population was 617 at the 2010 census.