The steepest mile of the top cycling climbs in Utah. From this page you may navigate to the top 10 steepest bicycling climbs in UT. Utah's steepest bike climbs we have documented are featured in the slideshow below. Scroll down to access Utah's steepest mile Top 10 Bicycle Climbs "Table". The cycling climbs covering the steepest mile gradients in UT, and some of Utah's hardest and most scenic cycling climbs are, in order of steepness, 1. Powder Mountain, 2. Guardsman Pass, 3. Empire Pass, Midway, 4. Hwy 143, 5. Shafer Trail, 6. Empire Pass, Park City, 7. Butterfield Canyon, 8. Little Cottonwood Canyon, 9. La Sal Loop (Spanish Valley), and 10. Moki Dugway.