Deer Medicine Rocks (Siouan: literal translation "Antler Rocks") is a sandstone formation located on the west bank of Rosebud Creek in the vicinity of Lame Deer, Montana, United States. The formation is significant for its association with the Great Sioux War of 1876-77, and its connection with Sitting Bull's visionary sun dance of early June 1876 which prophesied victory at the Battle of the Little Bighorn. At its nomination to National Historic Landmark status in 2011, it was described as the only site to offer "a wholly Native American historical interpretation of the Battle of the Little Big Horn."