Description
20 mi. NE of Jack smith Bay and 38 mi. N of Goodnews, Kilbuck-Kuskokwim Mts.
History
Originally named "Helmick Mountain" by J. E. Spurr and W. S. Post (in Spurr, 1900, map 10), U.S. Geological Survey (USGS), for Reverend Benjamin Helmick, Moravian missionary who work in this area. The descriptive name "Thumb Mountain" was published in 1915 by U.S. Coast and Geodetic Survey (USC&GS) on Chart 9103. It was so called because "from off Quinhagak it resembles a huge thumb placed on a high flat mountain plateau." (U.S. Coast and Geodetic Survey, 1916, p. 249).