OBSTRUCTION OF PATHWAYS: Is it against the law for a bicyclist to obstruct pedestrian pathways under California law?

Yes.

Obstruction of Pedestrians (CVC 21210):  Bicyclists may not leave bicycles on their sides on the sidewalk or park bicycles in a manner which obstructs pedestrians. 

More Legal Questions About Pedestrian & Bicycle Accidents?

Do you have more legal questions about car & motorcycle accident cases?  Return to the Pedestrian & Bicycle Accidents in California Frequently Asked Legal Questions page.