In the early years, US 70 had a different route between Clovis, New Mexico and eastern Arizona, taking the route of current US 60 and US 180 to an endpoint in Holbrook, Arizona. US 70 was later re-routed to El Paso, Texas, when US 60 was extended to California. US 70 was later re-routed again west of Alamogordo, New Mexico along its current route to Globe, as well as being concurrent with US 60 to a common terminus in Los Angeles, California. In the 1960s, US 70 was truncated to its current terminus in Globe.