The California vole is a medium-sized vole with a cinnamon-brown to tawny-olive dorsum overlain by dark brown or black hairs. The underparts are medium gray, sometimes washed with buff; the tail is bi-colored, black above and gray below. The feet are grayish.

It occurs from near Eugene south through the interior valleys of Oregon and most of California. It has been found in the drainages of the upper Willamette, Umpqua, and Rogue rivers in Lane, Douglas, Jackson, and Josephine counties.

This vole spend most of the time underground in its burrows or in those of other species; it makes only brief above ground excursions.