in Chigmit Mts., extends 8.5 mi. on E bank of Pile River, NE of Iliamna Lake, Aleutian Range
So named because the mountain is composed of three peaks over 4,500 ft.; reported in 1958 by U.S. Geological Survey (USGS).
Brooks Creek, Chinkelyes Creek, Ospook Creek,
Valleys:Cities: