The state of California does not have a spec. law regarding riding a bicycle on sidewalks. The state has left this subject open for each county and local city gov to figure out on their own how they would like to handle the issue... For LA & LA county Sidewalk Riding (LAMC 56.15) Prohibits the riding of bicycles (or other human power devices) on sidewalks (bikeways or boardwalks) with a willful or wanton disregard for the safety of persons or property. Disallows the riding of bicycles on Ocean Front Walk in Venice.
San Francisco Transportation Code Sec. 7.2.12 forbids sidewalk bicycle riding, and Sec. 1007 Children under the age of 13 may ride a Sidewalk Bicycle on any sidewalk except as otherwise posted.
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