Frazier Mountain (Samala: Toshololo) is a broad, pine-forested peak in the Transverse Ranges System, within the Los Padres National Forest in northeastern Ventura County, California.

Frazier Mountain is named after the American miner William T. Frazer, who worked in the area in the 1850s, with a spelling alteration.

[5] The community of Frazier Park and its outlying district of Lake of the Woods are northward of the mountain.

Interstate 5 runs to the east of the mountain, and Southern California Edison's Path 26 500 kV wires are at its eastern foothills.

The highest point is accessible by a forest road that is open when there is no snow present on the mountain.