Join a naturalist on a Tree Walk, Sunday, Aug. 4 from 10 to 11 a.m. at the National Wildlife Visitor Center, 10901 Scarlet Tanager Loop, located off Powder Mill Road between the Baltimore-Washington Parkway and Route 197.

All ages can discover how to identify local trees by leaf, bark and flower in this informative half-mile hike. Registration is required.

Call 301-497-5887 for reservation. Donations to the Friends of Patuxent are appreciated.