Big Slackwater Boat Ramp offers a single concrete ramp (29 feet wide) with a soft launch option for accessing the Potomac River above Dam #4 in Sharpsburg, Maryland.

The facility features a large paved parking lot with 23 car spaces and 14 trailer spaces, plus a permanent restroom and picnic tables.

Important note: All boaters must exit the river before Dam #4, which is a river hazard, and public access is limited in this section due to dams below the location.