Take a guided hike around Battle Ground Lake at Battle Ground Lake State Park, 18002 N.E. 249th St., Battle Ground. Enjoy a one-mile hike around the lake from 11 a.m. to 12:30 p.m. July 29 while learning how it was formed and developed, and about the native plants and animals that call the park home. To reserve your spot, email battle.ground@parks.wa.gov or call 360-687-4621.