Downtown Petaluma Celebrate Petaluma’s starring role in movie history. Filmed in 1972, director George Lucas used Petaluma streets for many of the iconic movie’s most memorable scenes. More than 400 classic American cars with hoods open and polished chrome sparkling in the sunlight will line downtown streets.  Free to attend, 10am-8pm,

• Jumpstart Dinner, May 16, Glenn Ranch

• Cruise-In and Kickoff Social, May 17, 4-8pm, Plaza North Shopping Center