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3.0 mi 4.8 km Sharksfin Trail
Difficult Difficult
Lauterbrunnen, CH
Difficult Difficult
Lauterbrunnen, CH
4.7 mi 7.6 km Upper Browns Creek Trail #1429
Intermediate Intermediate
Alpine, CO
Intermediate Intermediate
Alpine, CO 39 
4.4 mi 7.1 km Harney Peak #9 (North)
Intermediate/Difficult Intermediate/Difficult
Custer, SD
Intermediate/Difficult Intermediate/Difficult
Custer, SD
3.3 mi 5.4 km Harney Peak #9 (South)
Intermediate/Difficult Intermediate/Difficult
Custer, SD
Intermediate/Difficult Intermediate/Difficult
Custer, SD 21 
5.4 mi 8.7 km Hell Canyon Trail
Intermediate/Difficult Intermediate/Difficult
Custer, SD
Intermediate/Difficult Intermediate/Difficult
Custer, SD 10 
7.9 mi 12.7 km Black Elk Peak Loop
Intermediate/Difficult Intermediate/Difficult
Custer, SD
Intermediate/Difficult Intermediate/Difficult
Custer, SD 60 
13.0 mi 21.0 km Little Scraggy Loop
Intermediate/Difficult Intermediate/Difficult
Pine, CO
Intermediate/Difficult Intermediate/Difficult
Pine, CO 19 
103.6 mi 166.8 km Leadville Trail 100
Difficult Difficult
Leadville, CO
Difficult Difficult
Leadville, CO 11 
25.8 mi 41.5 km CDT: North Lake to Wyoming Border (CO Sec. 44)
Intermediate Intermediate
Steamboat Springs, CO
Intermediate Intermediate
Steamboat Springs, CO
27.1 mi 43.6 km Four Pass Loop
Difficult Difficult
Snowmass Village, CO
Difficult Difficult
Snowmass Village, CO 216 
4.6 mi 7.4 km Castlewood Canyon - Rimrock to Creek Bottom Loop
Intermediate Intermediate
Castle Rock, CO
Intermediate Intermediate
Castle Rock, CO 63 
47.5 mi 76.5 km Rim-to-Rim-to-Rim (R2R2R)
Difficult Difficult
Grand Canyon, AZ
Difficult Difficult
Grand Canyon, AZ 85 
23.2 mi 37.3 km Longs Peak Valley Loop
Difficult Difficult
Estes Park, CO
Difficult Difficult
Estes Park, CO 14 
26.5 mi 42.6 km Pawnee-Buchanan Loop
Difficult Difficult
Nederland, CO
Difficult Difficult
Nederland, CO 67 
5.5 mi 8.8 km Beartrack Lakes Trail #43
Intermediate/Difficult Intermediate/Difficult
Idaho Springs, CO
Intermediate/Difficult Intermediate/Difficult
Idaho Springs, CO
17.2 mi 27.7 km Centennial Cone Loop
Intermediate Intermediate
Idaho Springs, CO
Intermediate Intermediate
Idaho Springs, CO 41 
38.1 mi 61.3 km Telluride Mountain Run 38 Mile
Very Difficult Very Difficult
Telluride, CO
Very Difficult Very Difficult
Telluride, CO
8.5 mi 13.6 km Foothills Trail
Intermediate/Difficult Intermediate/Difficult
Laporte, CO
Intermediate/Difficult Intermediate/Difficult
Laporte, CO 13 
11.8 mi 18.9 km Alpine Lakes Loop
Intermediate/Difficult Intermediate/Difficult
Centennial, WY
Intermediate/Difficult Intermediate/Difficult
Centennial, WY 16 
7.1 mi 11.4 km Medicine Bow Peak Loop
Difficult Difficult
Centennial, WY
Difficult Difficult
Centennial, WY 27 
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