 The peak is located about southeast of the city of Elko in the Ruby Mountains Wilderness, within the Ruby Mountains Ranger District of the Humboldt-Toiyabe National Forest.One of the most voluminous mountains in the range, its base makes up most of the east wall of Thomas Canyon, as well as the west wall of the long curved section of upper Lamoille Canyon.Thomas Peak and the adjacent canyon and campground is named after Raymond Thomas, a teacher at Elko High School, who led a group of hikers into the canyon in October 1916.