Charlies Bunion is a 5,528-foot mountain on the Tennessee–North Carolina line, notable for a large rock outcrop below its summit and for being an uncommon bare-rock peak in the usually wooded Great Smoky Mountains. Part of the Sawteeth and formed from ancient Precambrian slate later uplifted during Appalachian mountain building, it rises above steep northern slopes and broad southern drainages. Once remote and largely forested, the mountain’s barren profile emerged after logging helped fuel a 1925 fire and a 1929 cloudburst stripped away damaged soil. Since the Appalachian Trail was built here in 1935, it has become a popular high viewpoint and hiking destination.