Challis, Idaho

Challis is the largest city in Custer County, Idaho, United States. It is the county seat and its population was 1,081 at the 2010 census, up from 909 in 2000.HistoryChallis was founded in 1878 and named for A.P. Challis, who was a surveyor when the townsite was laid out. Challis post office was established in 1878.Twin Peaks Sports, the I.O.O.F. Hall, and a number of other buildings in Challis are individually listed on the National Register of Historic Places, most as a result of an Idaho State Historical Society study of historical resources in the town.Highways25px - US 93 - to Salmon (north) and Mackay (south) - to Stanley (southwest) The Salmon River Scenic Byway uses both highways, from Stanley to Salmon. The junction with Highway 75 is south of Challis.