Christmas Lights are a big event in Petaluma...it's great fun to drive around and see all the houses dressed up for the holidays.
The official self-driving tour runs from December 8 - December 27th. For map and details, send business-size SASE to Petaluma Visitors Program, Historic Depot Building, 210 Lakeville St. Petaluma, CA 94952. Or just drive around and explore on your own. Either way it's great fun!