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5.8 mi 9.4 km Briones to Mt. Diablo Trail
Intermediate Intermediate
Diablo, CA
Intermediate Intermediate
Diablo, CA 12 
6.5 mi 10.4 km Old Borges Ranch Double Loop
Intermediate Intermediate
Walnut Creek, CA
Intermediate Intermediate
Walnut Creek, CA 14 
11.5 mi 18.4 km El Corte Madera Open Space Loop
Intermediate/Difficult Intermediate/Difficult
Portola Valley, CA
Intermediate/Difficult Intermediate/Difficult
Portola Valley, CA 121 
19.2 mi 30.9 km Braille Flow
Difficult Difficult
Day Valley, CA
Difficult Difficult
Day Valley, CA 194 
10.8 mi 17.4 km Camp Tamarancho Loop
Difficult Difficult
Fairfax, CA
Difficult Difficult
Fairfax, CA 215 
13.2 mi 21.3 km Crockett Hills
Intermediate/Difficult Intermediate/Difficult
Crockett, CA
Intermediate/Difficult Intermediate/Difficult
Crockett, CA 131 
16.7 mi 26.9 km Trione-Annadel State Park - Big Loop
Difficult Difficult
Santa Rosa, CA
Difficult Difficult
Santa Rosa, CA 60 
7.9 mi 12.6 km Annadel Loop Alternative
Intermediate/Difficult Intermediate/Difficult
Santa Rosa, CA
Intermediate/Difficult Intermediate/Difficult
Santa Rosa, CA 23 
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