Outcrop of the Marburg Schist within Codorus State Park, York County, Pennsylvania. The building in the background is the Black Rock Lodge operated by the park. The photo was taken when the level of Lake Marburg was well below average (about 187.7 ft elevation). The Marburg Schist is described as "bluish-gray to slivery-green fine-grained schist, containing muscovite, chlorite, albite or chloritoid, and quartz." (Lloyd, O.B., Jr. and Growitz, D.J., 1977, Ground-water resources of central and southern York County, Pennsylvania, Pennsylvania Geological Survey, Water Resource Report 42, 1:62,500.) This outcrop was apparently low-grade slate or phyllite.
Outcrop of the Marburg Schist within Codorus State Park, York County, Pennsylvania. The building in the background is the Black Rock Lodge operated by the park. The photo was taken when the level of Lake Marburg was well below average (about 187.7 ft elevation). The Marburg Schist is described as "bluish-gray to slivery-green fine-grained schist, containing muscovite, chlorite, albite or chloritoid, and quartz." (Lloyd, O.B., Jr. and Growitz, D.J., 1977, Ground-water resources of central and southern York County, Pennsylvania, Pennsylvania Geological Survey, Water Resource Report 42, 1:62,500.) This outcrop was apparently low-grade slate or phyllite. Jstuby · CC0

Codorus State Park

State Park · Pennsylvania · Pennsylvania Department of Conservation and Natural Resources

The 3,452-acre Codorus State Park is in the rolling hills of southern York County. The 1,275-acre Lake Marburg has 26 miles of shoreline and is a reststop for migrating waterfowl and shorebirds. The lake is also popular with sailboaters and motorboaters. Anglers love the lake for warm water fishing and can also fish Codorus Creek for trout. Picnicking, swimming in the pool and camping are popular activities.

Plan your visit

Know before you go

Address
2600 Smith Station Road, Hanover, PA, 17331
Phone
717-637-2816
Official site
www.pa.gov
Managed by
Pennsylvania Department of Conservation and Natural Resources

Getting there

2600 Smith Station Road, Hanover, PA, 17331

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What's here

Activities & features: Amphitheater · Boat Rental · Boating · Cabin · Camping · Disc Golf · Dump Station · Fishing · Geocaching · Guided Tours · Hiking · Horseback Riding · Hunting · Lodging · Marina · Mountain Biking · Paddling · Pets Allowed · Picnic Area · Scenic Overlook · Scuba Diving · Swimming · Wildlife Viewing · Winter Recreation

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Sources: State agency, Wikimedia Commons / editorial · updated 2026-08-12