Shell Ridge - Diablo Foothills Regional Park - California, United States

Shell Ridge Open Space

Shell Ridge is the City of Walnut Creek's largest open space unit, with trails for biking, hiking and riding through oak woodlands and grassland savannah on the lower flanks of Mount Diablo. Shell Ridge gets its name from the marine fossils left behind when the ocean waters that once covered the area receded.

Approximately 31 miles of hiking, biking and equestrian trails. Bikes are permitted only on paved and unpaved roads over eight feet in width.

Within Shell Ridges is the Borges Ranch, a site on the National Register of Historic Places. A working cattle ranch complete with farm animals, it provides a glimpse at life a century ago.