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  Shell Ridge Open Space
City of Walnut Creek Open Space and Trails Division
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.

Where it is: 1035 Castle Rock Road, 1/2 mile past Northgate High School (Trail Map)

 What it offers: 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. For more on Old Borges Ranch, including fees for group use of the picnic area and/or ranch, click here.

Just below Borges Ranch is the Bob Pond Picnic Area, with picnic tables, a children's fishing pond, play area and amphitheatre and Hanna Grove.

Restrooms and drinking water are available at the ranch and the picnic area.

 Hours: Daylight hours only.

 Dogs:Dogs? Rangers recommend dogs remain leashed at all times. If they are off leash, dogs must be under positive sight and voice command.(please keep in mind there is abundant wildlife in the area, including coyotes, as well as cattle)