Emigrants by the thousands entered present day eastern Idaho at this location traveling along the Oregon-California Trail. Emigrants on the trail encountered Big Hill, thought to be the steepest and longest descent found on the trip west. Wheel ruts are still visible today from the locking of wagon wheels. East of Montpelier at ITD roadside pullouts on U.S. 30 (Milepost 440.1, Milepost 441.7 and Milepost 454.5).
Oregon-California Trail Portal – Big Hill