First up: Cunningham Falls State ParkLocated less than 5 miles from the rally, right down MD Route 77, CFSP offers hiking, sightseeing, and swimming among other activities. The Houck area of the park has the falls itself, as well as lake for swimming (including a sandy beach!) Affordable for an entire day or for a quick dip in the lake.

•Day Use Service Charge: Memorial Day-Labor Day, weekdays $3/person; Memorial Day-Labor Day, weekends and holidays $4/person; all other times $3/vehicle. Out-of-state residents add $1 to all day use service charges.
•Hours of Operation: 8 a.m. to Sunset, April through October; Lifeguards are on duty at the lake between 11 a.m. and 6 p.m., Memorial Day to Labor Day. Lifeguard coverage may be adjusted during periods of inclement weather.
All roads into the main areas and parking are paved.
More info here:
http://www.dnr.state.md.us/publiclands/western/cunningham.asp
