Boisvert, Conrad J. Bay area mountain bike trails : : 45 mountain bike rides throughout the San Francisco Bay area / [electronic resource] / by Conrad J. Boisvert.. — Penngrove, CA : : Penngrove Publications,, c1993.. — 158 p. : : ill., maps ; 21 cm.
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Bicycle touring--California--San Francisco Bay Area--Guidebooks. Mountain biking--California--San Francisco Bay Area--Guidebooks.