 The unimproved route was incorporated into the westernmost end of the State Route 52 alignment, which had been redefined to extend from the California state line, through Pahrump and the Dixie National Forest north of Charleston Peak, to State Route 5 southeast of Indian Springs.By 1940, State Route 52 was shown to be discontinuous through the national forest.The portion of SR 52 west of Pahrump had been improved to a gravel road by 1950, and had been constructed to a paved highway by 1956.