Cub Run Stream Valley Park is the 3rd largest park in Fairfax County and its 5.2 mile trail meanders through more than 800 acres of woods and meadows. It’s watersheds are major tributaries to the Occoquan Reservoir and Potomac River Estuary. All members of the public are encouraged to participate in the volunteer clean up event at various locations along the Cub Run Stream Valley Park on Saturday, March 25 from 9 a.m. to 11:30 a.m. For a full list of volunteer locations and more information, please visit the program website.