Roaring Run Natural Area is a 3,582-acre (1,450 ha) protected area in Westmoreland County, Pennsylvania, United States.

[1][2] The Natural Area was established in 1975 to protect the watershed of Roaring Run nearly in its entirety.

It is the largest protected area within a state forest in western Pennsylvania,[3] and was originally donated to the state after having been acquired by Western Pennsylvania Conservancy.

[2] Within the Natural Area's boundaries, Roaring Run descends more than 1,200 feet down the west side of Laurel Hill,[1] and foresters have documented more than 50 of the 120 tree species that occur naturally in Pennsylvania.

[2] The area can be explored via an extensive network of hiking trails,[2] and the long-distance Laurel Highlands Hiking Trail passes through a corner of the area.