It is then transferred via tunnel from Loch Raven to the Montebello Filtration Plants in Baltimore for treatment and distribution.

[4] According to tradition, the reservoir was named after a settler's horse, Pretty Boy, who drowned in a nearby creek.

The reservoir area serves as land for hiking, mountain biking, road cycling, fishing, and boating.

Increased water levels make for excellent kayaking because of the narrow width of Gunpowder Falls' valley.

[9] On June 23, 2008, Prettyboy Reservoir became the site of the first rescue performed by the Baltimore County Fire Department using a helicopter with rescuers dangling from a rope.