Medlock Bridge Recreation area is essentially a parking lot with trails around it that also has a boat ramp that provides easy access to the Chattahoochee.(No parking fee/ closes at dark). It's no grand park to visit or a climbing destination worth a long drive, but if you are looking for a fun area to boulder in Peachtree Corners, this is not a bad option. Yo might want to bring a minimal amount of trad gear to place protection, because the routes are overhanging a steep hill.