The longest cycling climbs in California. From this page you may navigate to the top 10 Longest bicycling climbs in California. The CA longest bike climbs we have documented are featured in the slideshow below. Scroll down this page to access the California Longest 10 Bicycle Climbs "Table". The cycling climbs covering the most distance in California, and some of the hardest and most scenic bicycling climbs this state are, in order of distance, 1. Hwy 33 to Pine Mountain Summit, 2. Onyx Summit, 3. Hwy 21-245-180-198, 4. Sand Creek-245-180-198, 5. Mt. Baldy from Hwy 39, 6. Glendora Mountain Road, 7. Foresthill Road - Robinson Flat, 8. Hwy 180 & 198, 9. Glacier Point, and 10. Shirley Meadows West.