Pine Grove Furnace State Park is a protected Pennsylvania area that includes Laurel and Fuller Lakes in Cooke Township of Cumberland County.

[2] The 1870 South Mountain RR and the subsequent 1891 Hunter's Run and Slate Belt Railroad provided the railway lines to the industrial areas of the state park.

The Fuller Brick and Slate Company's operations that began in 1892 were developed by J. W. Ivery at the "Pine Grove works"[4] using clay exposed in the region's quarries.

Slate was quarried 3 mi (4.8 km) southwest of the works, the soapstone was "hauled by wagon from the quarry a quarter of a mile from the works, and the clay [was] brought by rail from Laurel Station, three miles away" (the Pine Grove kiln held 12,000 bricks).

[13] Fuller Lake is 1.7 acres (0.69 ha) in the area and is filled, abandoned quarry of the Pine Grove Iron Works.

[14] The marker for the Appalachian Trail midpoint is east of the state park (40°1.827′N 77°17.225′W / 40.030450°N 77.287083°W / 40.030450; -77.287083),[12] and thru-hikers completing the store's half-gallon ice cream challenge receive a commemorative wooden spoon.

[19] Charcoal Hearth Campground along Bendersville Rd is 0.25 miles (0.40 km) south of the park's store and has 71 sites for travel trailers and tenting, and across the road is a wooded "organized group tenting" area around an open playing field (a YMCA camp is near Laurel Lake).

In addition to the typical mammals, birds, and other fauna of the northeastern US ecoregion, the park's Laurel Lake attracts migratory waterfowl of the Atlantic Flyway (butterflies reach their peak in the summer months.)