McConnells Mill State Park - Portersville, Pennsylvania
McConnells Mill State Park - Portersville, Pennsylvania Doug Kerr from Albany, NY, United States · CC BY-SA 2.0

McConnells Mill State Park

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

McConnells Mill State Park, in Lawrence County, encompasses 2,546 acres of the spectacular Slippery Rock Creek Gorge. Created by the draining of glacial lakes thousands of years ago, the gorge has steeps sides and the valley floor is littered with huge boulders and is a national natural landmark. A gristmill built in the 1800s is open for tours. The park is open from sunrise to sunset, year-round.

Plan your visit

Know before you go

Address
225 Pleasant Valley Road, Portersville, PA, 16051
Phone
724-368-8811
Official site
www.pa.gov
Managed by
Pennsylvania Department of Conservation and Natural Resources

Getting there

225 Pleasant Valley Road, Portersville, PA, 16051

Directions on Google Maps →

What's here

Highlights: Alpha Falls · Slippery Rock Gorge · McConnells Mill Covered Bridge · Old Mill

Activities & features: Boating · Fishing · Geocaching · Guided Tours · Hiking · Historic Feature · Hunting · Natural Feature · Nature Trail · Paddling · Picnic Area · Rock Climbing · Scenic Overlook · Waterfall · Wildlife Viewing

Photos

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