The longest cycling climbs in Colorado. From this page you may navigate to the top 10 Longest bicycling climbs in Colorado. The CO longest bike climbs we have documented are featured in the slideshow below. Scroll down this page to access the Colorado Longest 10 Bicycle Climbs "Table". The cycling climbs covering the most distance in Colorado, and some of the hardest and most scenic bicycling climbs this state are, in order of distance, 1. Trail Ridge, 2. Colorado National Monument, 3. Mount Evans, 4. Lyons to Ward to Brainard Lake, 5. Pikes Peak, 6. Left Hand Canyon - Jamestown - Brainard, 7. CO 141 from Gateway, 8. Lyons to Ward, 9. Trail Ridge West, and 10. Left Hand Canyon - Ward - Brainard Lake.