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Contra Costa County

Location: Contra Costa County, CA Difficulty: Easy Features: Hiking trails, bird watching, bike friendly, dogs allowed, incredible scenery Briones Regional Park

  Location:┬áDiablo Foothills Regional Park,┬áContra Costa County, CA Miles:┬á3.9 miles Difficulty: Easy -┬áModerate Duration:┬á4 hours Users:┬áHikers, dogs, horses, and mountain bikes permitted. Partial