(DC) (Potomac Conservancy) Join Potomac Conservancy and the National Park Service for a safe, fun, 50 person trash cleanup at Columbia Island. Make a huge difference for the Potomac River as we turn to the water for a safe, healthy place to recreate outdoors.

(DC) (Friends of Kenilworth Aquatic Gardens) Participate in a variety of park stewardship activities including invasive plant removal, litter collection, flower bed weeding, trail maintenance and more. Some activities involve working in shallow ponds. This event will run rain or shine—please dress accordingly and plan to work outside! Space is limited for this event. However, walk-up registration is available if ...