Colorado:
Bear Peak via Fern Canyon & West Ridge, Boulder, CO (7.6 miles - Moderate to Difficult)
Bitterbrush - Nighthawk Trail, Hall Park, Lyons, CO (9.4 miles - Easy to Moderate)
Boulder Creek Path, Boulder, CO (18 miles - Easy)
Boulder Reservoir Loop, Boulder, CO (5.25 miles - Easy)
Diamond Lake, Nederland, CO (5.3 miles - Moderate)
Doudy Draw Trail, Boulder, CO (6.6 miles - Easy to Moderate)
Eagle-Sage Loop, Boulder, CO (3.75 miles - Easy)
Eldorado Canyon Trail, Eldorado Canyon State Park, CO (7 miles - Moderate to Difficult)
Green Mountain via Gregory Canyon, CO (5.4 miles - Moderate to Difficult)
Guardians of the Flatirons, Boulder, CO (12.2 miles - Difficult)
High Plains Trail, Boulder, CO (5.02 miles - Easy)
Left Hand Trail, Boulder, CO (6.0 miles - Easy)
Marshall Mesa - Coal Seam Loop, Boulder, CO (3 miles - Easy)
Mesa Trail, Boulder, CO (13.4 miles - Easy)
Meyers Homestead, Boulder, CO (5.2 miles, Moderate)
Mount Sanitas, Boulder, CO (3.3 miles - Moderate to Difficult)
Rattlesnake Gulch, Eldorado Canyon State Park, Boulder, CO (5.3 miles - Easy to Moderate)
Royal Arch, Boulder, CO (3.6 miles - Moderate to Difficult)
South Boulder Creek - Big Bluestem Loop, Boulder, CO (4.35 miles - Easy)
South Boulder Peak via Shadow Canyon, Boulder, CO (6.7 miles - Difficult)
Spring Brook Loop via Dowdy Draw, Boulder, Colorado (5.2 miles - Easy to Moderate)
Walker Ranch Loop, Boulder, Colorado (7.6 miles - Moderate)