Top 10 bike climbs in Hawaii with the greatest elevation gain. We have documented most of the 10 Hawaiian Bike climbs with the most elevation gained and those are featured in the slideshow on this page as well as the Table for the full Top 10 Hawaiian Bike Climbs. The cycling climbs gaining the most altitude in Hawaii, and some of the hardest and most scenic California bicycling climbs are, in order of elevation gain, 1. Mauna Kea, 2. Mauna Loa, 3. Haleakala, 4. Kaloko Dr, 5. Waipoli Rd, 6. Stainback Road, 7. Waimea Canyon - Kokee Road, 8. Waimea Canyon - Hwy 550, 9. Baldwin - Olinda Roads, and 10. Chain of Craters Road