Lake Size: 206.5 km
Latitude: 39.6432
Longitude: -76.7408
Counties: Baltimore County

Information: The water from Prettyboy Reservoir is transferred to Loch Raven Reservoir via Gunpowder Falls rather than directly to Baltimore. It is then transferred via tunnel from Loch Raven to the Montebello Filtration Plants in Baltimore for treatment and distribution. Prettyboy Dam, completed in 1932, impounds the Gunpowder Falls to create the Reservoir. The dam has a spillway crest elevation of 520 ft (160 m) of MSL and covers about 1,500 acres (6.1 km2). Prettyboy Reservoir sits behind the scenic Prettyboy Dam on the Gunpowder River. Popular for hiking, mountain biking and fishing, Prettyboy makes a fun weekend adventure only minutes up Interstate 83 from Baltimore City. Prettyboy is also popular for swimming, which is prohibited. Sport bike riders and sports car enthusiasts also flock to the roads in the parklands that surround the reservoir.