Top bike climbs in Northern California (cycling Santa Clara, Santa Cruz, Alameda, Contra Costa, Solano, San Francisco, Marin Sonoma, Napa, Shasta, Lassen, Humboldt, Mendocino, Lake, Alpine, Fresno, , Counties, Sierra Nevada, Lake Tahoe and more).. This page contains the top bike climbs in Northern California . Cycling, riding and climbing the top, most difficult, hardest, challenging, extreme, best, scenic, inspiring, bucket list climbs in the Northern California. These climbs can be viewed via the map below (scroll in to view climbs in particular areas), by a detailed list of the climbs that can be arranged by difficulty, distance (longest climbs in the area), altitude gained, highest elevation (highest summit), average grade (sort the grades by varying distances), lowest start point, etc. You can also view the Top 10, Top 25, and Top 50 bike climbs in the Northern California. Click on "Climb Page" to jump to the detail page for that particular bike climb.