For families who don’t relish going door-to-door during Halloween, Petaluma has a solution: the Trick-or-Treat Trail. During the event, downtown Petaluma businesses hand out goodies so hairy monsters, one-eyed pirates, and bespectacled Harry Potters don’t have to travel too far to get goodies. The free event will be held on October 31, 3–5:30 p.m. For more information, go to petalumadowntown.com.