Roberto Serna Martinez > Trail Favorites List

16.7 mi 26.9 km Trione-Annadel State Park - Big Loop Difficult Santa Rosa, CA	Difficult	Santa Rosa, CA	59
7.1 mi 11.5 km Old Railroad Grade Intermediate Mill Valley, CA	Intermediate	Mill Valley, CA	20
7.4 mi 12.0 km Waterdog Lake Park Loop Intermediate/Difficult San Carlos, CA	Intermediate/Difficult	San Carlos, CA	109

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