State County California Additional portions of the range within this state still need to be refined. California Alameda California Butte California Colusa California Contra Costa Alaska County-level range not defined Oregon County-level range not defined Washington County-level range not defined California Del Norte California Glenn California Humboldt California Marin California Mendocino California Merced California Napa California Sacramento California San Francisco California San Joaquin California San Mateo California Santa Clara California Shasta California Siskiyou California Solano California Sonoma California Stanislaus California Sutter California Tehama California Trinity California Yolo California Yuba