Cycling and climbing by bike the top climbs in the San Francisco Bay Area (cycling Santa Clara, Santa Cruz, Alameda, Contra Costa, Solano, San Francisco, Marin Sonoma and Napa Counties).. This page contains the top bike climbs in the Bay Area (includes East Bay, North Bay, Peninsula, San Francisco and South Bay subregions) including #1 Mt. St. Helena, Napa County, #2 Mix Canyon, Solano County, #3 Hicks Road to Mt. Umunhum (north), Santa Clara County, #4 Hicks Road - Mt. Umunhum (south), Santa Clara County, #5 Alba Road, Santa Cruz County, #6 Mt. Diablo - Northgate, Contra Costa County, #7 Soda Springs Road, #8 Bald Mountain, Sonoma County, #9 Mt. Diablo - South Gate, Contra Costa County and #10 Welch Creek Road, Alameda County.