Colonel Denning State Park spans 273 acres in Pennsylvania’s Cumberland Valley, and is a peaceful spot anchored by the 3.5-acre Doubling Gap Lake. The park includes a 49-site campground with potable water, picnic tables, fire rings, electric hookups, and restrooms with warm showers—open seasonally from spring through late fall. It is a vital hub for hikers exploring theTuscarora Trail, with direct access to additional loops like the Flat Rock Trail and Doubling Gap Nature Trail. The park is a gateway to the Tuscarora State Forest, making it easy to transition into longer hikes to explore more of this beautiful area.