Beginning Nov 1, 2022, Seneca Creek State Park's official opening time switches to 10:00 am.
Winter official operating hours of 10:00 am to sunset will remain in effect from November 1 through March 31. When staffing permits, the park may open earlier Monday through Friday, but will usually not open until 10:00 am on weekends.
To reserve one of our rental picnic areas or pavilions, contact the Maryland Park Service reservation desk at 1- 888-432-2267 or
For all other questions, contact the Park:
Seneca Creek State Park
11950 Clopper Road
Gaithersburg, MD 20878
8 a.m. to Sunset, March-October
10 a.m. to Sunset, November-February
This Month's Events
Service Fee Charges:
Weekends and Holidays, April-October: $3 a person for Maryland residents
$5 a person for Out-of-State residents
The park, comprised of 6,300 acres, extends along 14 scenic miles of Seneca Creek, as it winds its way to the Potomac River. The Clopper Day-Use Area contains many scenic areas, including the 90-acre Clopper Lake, surrounded by forests and fields. Picnicking, boat rentals, trails and a tire playground are just some of its recreational opportunities. A restored 19th century cabin and a self-guided path interpret the history of the area. Over 50 miles of trails are open for hiking, horseback riding and bicycling which wind through a variety of habitat.
Note: Swimming and wading are not permitted in Clopper Lake at Seneca Creek State Park. The closest Maryland State Parks with lifeguarded lake swimming are
Cunningham Falls State Park and
Greenbrier State Park. Wading is permitted at your own risk in Great Seneca Creek, the free flowing creek which runs the length of Seneca Creek State Park.