Between Orr's Ranch and the north edge of the Dugway Range, the original highway ran through the current Dugway Proving Ground around the north side of the Dugway Range (). From there it headed south to the Black Rock Hills, joining the old Pony Express route there (). The Lincoln Highway then went west past Fish Springs () and Callao () and across the Deep Creek Range through the Overland Canyon () to Ibapah (), crossing into Nevada soon after. This route is now known by the names of Simpson Springs-Callao Road, Pony Express Road, Overland Canyon Road, Lower Goldhill Road, Ibapah Road and Willow Road.