Shell Ridge Open Space - Walnut Creek, CA

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The Shell Ridge Open Space sits the foothills of Mt. Diablo about 30 miles east of San Francisco. The hilly terrain offers unique features and vegetation over 30+ miles of trails. In this run, Kevin Selby starts at Old Borges Ranch on Castle Rock Road. Convenient Shell Ridge entrances are also located at the end of La Casa Via and Rudgear Roads.