Parks usually close at sunset. But during the Parks After Dark series, walkers can explore them at night. At the New Moon Star Walk families can peer up at the stars while exploring Helen Putnam Regional Park in Petaluma. Participants will play games and learn about nocturnal animals that live in the park. The event will be held on January 21, 5:30–7:30 p.m.; meet at the Chileno Valley Road Parking Lot. Admission is $10–$12 and parking is $7. Accommodations will be made for people with disabilities upon advance request. Register at tinyurl.com/ya8kdcba.