California State Route 39

California State Route 39 is a state highway running approximately 53 miles through Los Angeles and San Bernardino counties. It primarily serves as a connector between the San Gabriel Valley and the Inland Empire, passing through cities like Glendora, Azusa, and Pomona. The route traverses a mix of urban and semi-rural areas, providing access to local neighborhoods, commercial centers, and natural parks. It is mainly a two-lane road, often used by commuters and travelers heading to the San Gabriel Mountains or other regional destinations. SR 39 plays a vital role in local transportation infrastructure.