Custer County, Idaho

Custer County is located in central Idaho, a place of rugged mountains and remote valleys. Stanley, a popular tourist destination, sits at the foot of the Sawtooth Mountains. It’s breathtakingly beautiful but can be brutally cold.

This is where Idaho’s true outdoor enthusiasts come to play. There are rivers for rafting, peaks for climbing, and trails for hiking. The Frank Church–River of No Return Wilderness is partially located here and is the largest wilderness area in the contiguous United States.

The county seat is Challis, which is a bit more livable. Ranching remains an important part of life throughout the county, but tourism continues to grow. You’ll find cowboys and river guides sharing the same local bars. Here, the population is small and widely spread out.

CategoryDetails
County NameCuster County
County SeatChallis
Cities, Towns, and CommunitiesChallis, Mackay, Stanley, and more
Interstates and HighwaysU.S. Route 93, Idaho State Highway 75
FIPS Code16-037
Total Area4,971 square miles (land: 4,953 sq mi; water: 18 sq mi)
Adjacent CountiesLemhi County (North), Butte County (East), Blaine County (South), Elmore County (Southwest), Boise County (Southwest), Valley County (West)
Time ZoneMountain Time Zone
StateIdaho
Coordinates44.4° N, 114.2° W
EtymologyNamed after General George Armstrong Custer, a notable figure in American military history.
Major LandmarksSawtooth National Recreation Area, Challis National Forest, Mackay Reservoir
Population5,000
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