There are a number of crags and boulders strewn about the watershed property, of which the most prominent crags and boulders are in the Prettyboy and Loch Raven areas. But from what I'm told, Baltimore City does not care for/allow climbing with in the boundaries of the watershed property so I'm adding this for the sole purpose of historic reasons as climbing has taken place in the past.
The watershed property is scattered throughout Baltimore County.
Browse More Classics in Baltimore City Watershed
Mountain Project's determination of some of the classic, most popular, highest rated routes for Baltimore City Watershed:
Featured Route For Baltimore City Watershed