Join a Water Resources Education Center guide on a tracking exploration along the water’s edge in search of the animals that call the edge of the cottonwood forest home. Participants should expect to walk two miles on uneven, sandy beaches, muddy wetlands and along some paved pathways. The free program, from 9:30 a.m. to noon Aug. 17, is suitable for ages 10 and older. Registration is required at cityofvancouver.us/events/columbia-river-walk-following-the-tracks-2/. If the event is full, add your name to the waitlist by emailing vanwrec@cityofvancouver.us or calling 360-487-7111.