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Big Slackwater
AuthoritativeLocation
At the end of Dam #4 Road, Sharpsburg, MD 21782, MD 21782
GPS Coordinates
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About This Ramp
Hours
Sunrise to Sunset
Managed by
National Park Service
Ramps
1
Surface
Concrete
Amenities
Restroom
MD DNR1 data sourceUpdated Mar 2026
Big Slackwater is a public boat ramp on Potomac River in Washington County, Maryland (21782). Managed by National Park Service. GPS coordinates: 39.5011°N, 77.8452°W.