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Castle Rock Bouldering cover

Castle Rock Bouldering

by Clay Breitweiser

Castle Rock State Park and Sanborn County Park contain some of the finest sandstone bouldering and climbing in California. Just over an hour away from San Francisco, this world class bouldering area is the Bay Area's finest.

This guide contains over 230 boulder problems including many previously unpublished gems in little known areas, alongside many of the classics in almost every known area!

Turn by turn, gps guided navigation leads you right to your chosen sector, where interactive overview maps and photographs assist with orientation.

Sectors in alphabetical order:

Biddles Area37 climbs in 5 sectors
Castle Rock Area75 climbs in 9 sectors
Goat Rock Area23 climbs in 3 sectors
Indian Rock Area83 climbs in 7 sectors
Road Kill Rock Area18 climbs in 3 sectors
Sunnyvale Mountain Area11 climbs in 3 sectors
Waterfall Area10 climbs in 2 sectors


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