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Second-Third Flatiron Mesa Loop
Intermediate/Difficult Intermediate/Difficult
3.7 km 2.3 mi Boulder, CO 17 
Second-Third Flatiron Mesa Loop
Avg Rating
Intermediate/Difficult Intermediate/Difficult

Diane's Rating
Difficult Difficult
Mount Sanitas Trail
Difficult Difficult
2.0 km 1.3 mi Boulder, CO 31 
Mount Sanitas Trail
Avg Rating
Difficult Difficult

Diane's Rating
Difficult Difficult
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