Mentryville was an oil drilling town in the Santa Susana Mountains in Los Angeles County, California, USA. It was started by Charles Alexander Mentry in the 1870s around the newly discovered oil reserves in that area. The first oil strike was on September 26, 1876. The town is located at the terminus of Pico Canyon Road, four miles west of the Lyons Avenue exit from I-5 in Santa Clarita.