Volunteers are invited to celebrate Earth Day from 2 to 4 p.m. April 21 at the Washougal Waterfront Park picnic shelter at 56 S. First St., Washougal. Volunteers will be clean up trash along the park trail and river. The Port of Camas-Washougal will provide gloves, trash bags and trash grabbers. Light refreshments will also be provided. For more information, contact Amie Bittle at amie@portcw.com.