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7.9 mi 12.7 km Prospect
Intermediate
Mountain Village, CO
Intermediate
7.9 mi 12.7 km Mountain Village, CO
4.7 mi 7.5 km Bear Creek Falls
Easy/Intermediate
Telluride, CO
Easy/Intermediate
4.7 mi 7.5 km Telluride, CO 36 
40.7 mi 65.4 km Grand Traverse Mountain Run
Difficult
Crested Butte, CO
Difficult
40.7 mi 65.4 km Crested Butte, CO
8.2 mi 13.3 km Chasm Lake
Intermediate/Difficult
Estes Park, CO
Intermediate/Difficult
8.2 mi 13.3 km Estes Park, CO 76 
27.1 mi 43.6 km Leadville Trail Marathon
Intermediate
Leadville, CO
Intermediate
27.1 mi 43.6 km Leadville, CO
3.7 mi 5.9 km Rojo
Intermediate/Difficult
Maeser, UT
Intermediate/Difficult
3.7 mi 5.9 km Maeser, UT
3.0 mi 4.9 km Sound of Silence Trail
Intermediate
Naples, UT
Intermediate
3.0 mi 4.9 km Naples, UT
17.2 mi 27.7 km Centennial Cone Loop
Intermediate
Idaho Springs, CO
Intermediate
17.2 mi 27.7 km Idaho Springs, CO 26 
13.2 mi 21.3 km Golden Gate Canyon State Park Loop
Intermediate/Difficult
Coal Creek, CO
Intermediate/Difficult
13.2 mi 21.3 km Coal Creek, CO 25 
3.7 mi 6.0 km McIntosh Lake Trail
Easy
Longmont, CO
Easy
3.7 mi 6.0 km Longmont, CO 15 
17.4 mi 28.0 km Boreas Pass Road
Easy/Intermediate
Breckenridge, CO
Easy/Intermediate
17.4 mi 28.0 km Breckenridge, CO
3.2 mi 5.2 km Canyon Loop
Intermediate
Boulder, CO
Intermediate
3.2 mi 5.2 km Boulder, CO 13 
29.2 mi 47.0 km Lost Creek Wilderness Loop
Intermediate/Difficult
Bailey, CO
Intermediate/Difficult
29.2 mi 47.0 km Bailey, CO 35 
6.9 mi 11.1 km Mountain Lion Trail
Intermediate
Coal Creek, CO
Intermediate
6.9 mi 11.1 km Coal Creek, CO 50 
15.7 mi 25.2 km High Lonesome Loop
Intermediate/Difficult
Nederland, CO
Intermediate/Difficult
15.7 mi 25.2 km Nederland, CO 67 
2.7 mi 4.3 km Meyer's Homestead Trail
Easy/Intermediate
Coal Creek, CO
Easy/Intermediate
2.7 mi 4.3 km Coal Creek, CO
11.0 mi 17.8 km Teller Farm - The Tank
Easy
Gunbarrel, CO
Easy
11.0 mi 17.8 km Gunbarrel, CO
7.6 mi 12.3 km Walker Ranch
Intermediate/Difficult
Coal Creek, CO
Intermediate/Difficult
7.6 mi 12.3 km Coal Creek, CO 118 
16.3 mi 26.3 km Boulder Skyline Traverse
Difficult
Superior, CO
Difficult
16.3 mi 26.3 km Superior, CO 71 
20.0 mi 32.2 km Heil - Picture Rock Combo
Intermediate
Lyons, CO
Intermediate
20.0 mi 32.2 km Lyons, CO