Climb to dramatic views from San Pablo Ridge, descend to wooded streamsides, and traverse open grasslands: This challenging trip along the spine of the East Bay Hills crosses varied landscapes on trails that range from wide and rocky service roads to duff- covered narrow paths. You’ll find sheltered, tree-covered sections and exposed, breezy segments, and often encounter fog that rolls in from the Golden Gate. You’ll gain and lose considerable elevation in short stretches—an 860-foot gain in Tilden Regional Park and a 600-foot loss in Robert Sibley Volcanic Regional Preserve.
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