Westmorland is a city located in Imperial Valley in the Sonoran Desert of Imperial County, California. Westmorland presently is occupied by the corridors of California State Route 78 and California State Route 86 but was once on the corridor of US Route 99. US Route 99 was aligned on Main Street within Westmorland from 1926 until it was truncated to downtown Los Angeles in 1963. This blog will explore the history of US Route 99 in Westmorland. Above as the blog cover US Route 99 can be seen passing through Westmorland during 1936 in a Pomona Public Library photo. Below US Route 99 can be observed on the 1935 Division of Highways Map of Imperial County passing through Westmorland.
The initial draft of the US Route System was approved by the Secretary of Agriculture during November of 1925. The US Route System within California was approved by California Highway Commission (CHC) with no changes recommended which can be seen in January 1926 California Highways & Public Works. US Route 99 is shown departing San Bernardino via LRN 26 towards El Centro via Westmorland.
Thusly planned US Route 99 appears on the 1925 Rand McNally Map of California following LRN 26 through Westmorland.