On right bank of Little Joe Creek, 10 mi. S of Ruby, Kilbuck-Kuskokwim Mts.
Prospectors' name reported as "The Thumb" by Akin (1916, pl. 1), U.S. Geological Survey (USGS). Orth reported the present form of the name in 1956.
Ruby,
Dams:Islands:Mountains:Boston Dome, Cecil Dome, The Hub, Scow Mountain,
Rivers:Bootlegger Slough, Melozitna River,
Streams:Big Creek, Big Joe Creek, Birch Creek, Bruno Creek, Center Creek, Crooked Creek, Dome Creek, Elephant Creek, Falls Creek, Fourth of July Creek, Glacier Creek, Gold Run, Lion Creek, Little Bonanza Creek, Little Joe Creek, Lower Niklaremut Creek, Melozi Creek, New York Creek, Ruby Creek, Short Creek, Straight Creek, Swift Creek, Thirteenmile Creek, Upper Niklaremut Creek, Willow Creek,
Valleys:Bear Gulch, Boston Gulch, Fox Gulch, Glen Gulch, Last Chance Gulch, Logger Gulch, Lucky Gulch, Melozitna Canyon, Snow Gulch,
Cities:Long,