Trash Free Potomac Network - Connecting for a Trash Free Watershed

Seneca Landing / Riley's Lock
Cleanup Event

This Cleanup is part of the Potomac River Watershed Cleanup

April 18, 2020, 9:00 AM to 2:00 PM

Volunteers will work from canoes to clean up Seneca Creek and the nearby Potomac River.
All volunteers at this site will be working in groups. One group of experienced whitewater paddlers may work downstream through rapids to take out at Pennyfield Lock . Other groups may work on the smooth waters of Seneca Creek and the Potomac River upstream. All volunteers in boats are required to wear life jackets. Boats, life, jackets, and paddles will be provided.
Volunteers who prefer to work on land are also welcome.

Riley's Lock/ Seneca Landing
Also known as '(Mouth of Seneca Creek)'

Site Type

River (Active since 2007)


County: Montgomery

State: Maryland


Nearest City: Darnestown

GPS Coordinates: 39.069595, -77.340625


Directions: From I-495 take Md route 190 west for 11.9 miles to a stop sign at Seneca Road. Turn left, go half a mile and turn left on Riley's Lock Rd. (If you cross the bridge and see the old white store on your right, you've gone too far.) Drive about .6 mile on Rileys Lock Road with the creek visible on your right. The boat ramp will be on your right and you will park in the big lot on your left.

Watershed Middle Potomac
Sub Watershed Seneca Creek

Parking Capacity: 20

Restrooms are available.

This site is suitable for children under seven.

This site is suitable for the elderly.

This site is NOT suitable for the disabled.

Notes & Special Issues

This site is accessed from the Seneca Landing boat ramp (Montgomery Co. Parks) and is 1/10 th mile from Riley's Lock and the Seneca Aqueduct for the C&O Canal. Parking is plentiful. Participants will use canoes and kayaks to pick up trash and everyone is required to wear a life jacket. Caution is advised if the Potomac River has a high flow level, or if there are strong winds. Cleanups on the Potomac River can be made from this point with a shuttle and take-out at Violets Lock. Children must be accompanied by an adult. Those who prefer to stay on land are welcome to join other cleanup groups at the Rileys Lock site.


What To Expect


This site is open to the public

RSVP is Required

Maximum Volunteers: 20

Contact Info.

Kay Fulcomer



Volunteers will be working from canoes on Seneca Creek and on the Potomac River.
All participants are required to sign a waiver form, attend a brief safety talk, and wear a life jacket while on the water.