Mentryville was an oil drilling town in the Santa Susana Mountains in Los Angeles County, California, USA.

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.

[3][4] In 1875 Mentry partnered with Sanford Lyon, Henry Clay Wiley and Los Angeles lawman William Jenkins.

[5] "Pico Number 4", a short distance up the canyon from Mentryville, was the first commercially successful oil strike in California [1], and the longest running well on record [2], finally being capped in 1990.

The Pico Canyon oil field proved to be the richest in the state's history to that time, and Mentryville became a boomtown from 1876 to 1900.

[8] When Mentry died, the entire town of more than 200 people,[10][11] except for three individuals left behind in Mentryville, traveled to Los Angeles for his funeral, bringing with them a large floral arrangement in the shape of an oil derrick.

A visitor to the camp that year reported that "rusted oil equipment cluttered the canyon," toppled derricks lay rotting, and the cemetery was "choked with weeds, hidden and forgotten.

With help from the Santa Clarita Historical Society, Lagasse eventually began offering tours of Mentryville.

[11] Lagasse was forced to leave Mentryville after the 1994 Northridge earthquake damaged the house,[8] and in 1995, Chevron (which had become the owner upon its acquisition of Standard Oil of California in 1977) donated the Mentryville site and the surrounding 800 acres (3.2 km2) in Pico Canyon to the Santa Monica Mountains Conservancy.

[12] A group called the Friends of Mentryville was organized to restore the buildings and open the old town as a historic park with docent-led tours.