This boom era was not to last; before long the lumber was gone, leaving a barren landscape devastated by erosion and wildfires. In the late 19th and early 20th centuries, the Commonwealth of Pennsylvania bought thousands of acres of deforested and burned land, then began the project of reforestation. By the 1930s, the land that became Black Moshannon State Park was already a place for picnics and camping, on the aptly named "Tent Hill", and people swam and fished in the old mill pond. The Tent Hill Trail still runs from the campsites to the Black Moshannon Lake beach.