Some parts of the counties of Potter and Erie come under the watershed drainage area of St. Lawrence. The Mississippi River Watershed drains the rest of the State of Pennsylvania. The Monongahela and Allegheny Rivers flow through the western region of Pennsylvania and drain into the Ohio River at Pittsburg. Some of the other notable rivers of the western part of Pennsylvania are the Clarion River, Youghiogheny River, and the Beaver River.
The Pennsylvania State Map marks the 250 natural and artificial lakes of the state. Lake Conneaut is the biggest natural lake of Pennsylvania. Lake Erie is another important lake of the state.
Locations in the Map
MAJOR TOWNS: Harrisburg, Altoona, Johnstown, Pittsburgh, Williamsport, Scranton.
OTHER TOWNS/CITIES: Meadville, Allentown, Union City, Warren, Kane Emporium, St. Marys, Williamsport, Benwick, Scranton, Towanda, Mansfield, Wellsboro, Carbondale, Stroundsburg, Hazelton, Betblehem, Oil City, Merser, Brookville, Clearfield, Bottsville, Allentown, Indiana, Pittsburgh, Wheeling, Somerset, Waynesburg, Johnstown, Carlisle, York, Lancaster, Hershey, Gettyburg.
NEIGHBORING STATES: New York, Ohio, New Jersey, West Virginia, Maryland.
OCEANS, SEAS, RIVERS, BAYS & CANALS: Lake Erie.