Flat Rock Trailhead road/parking lot and the main parking lot by Pavilion #1 are closed. Please use the equestrian parking lot to access the Flat Rock Trail via the Rattlesnake Trail. A new connector trail between Rattlesnake Trail and Flat Rock Trail has been built - please use this trail to go to Flat Rock.
Due to the campground project work, the Colonel Denning Campground will be closed for the entire 2018 camping season. Camping may be available at nearby state parks. Updates for availability will be made as the project is finalized. Thank you for your understanding.
Colonel Denning State Park
Colonel Denning State Park, in north-central Cumberland County, has 273 acres of woodland and a 3.5-acre lake. The park serves as a gateway to the 96,000-acre Tuscarora State Forest, which surrounds the park.
These scenic and historic public lands are located in Doubling Gap, so named by the “S” turn where Blue Mountain doubles back on itself.
Seasons and Hours
The park is open every day of the year, sunrise to sunset. Day use areas close at dusk.
The park office is open specific hours. The beach, overnight areas, and other areas are open specific seasons and hours. Contact the park office for facility seasons and hours.
Make online reservations or call toll-free 888-PA-PARKS (888-727-2757), from 7:00 A.M. to 5:00 P.M., Monday to Saturday.
The park is eight miles north of Newville and nine miles south of Landisburg, along PA 233.
GPS DD: Lat. 40.28083 Long. -77.41837
Driving Directions: The Interactive GIS Map has turn-by-turn driving directions to the park office from the Park Information Window.
Please note that the background maps are maintained by a variety of public sources and driving directions usually go to the nearest large road.
Environmental Education and Interpretation
An environmental interpretor offers:
Ecological and historical walks and programs
Environmental education activities
Youth programs during the summer season
A visitor center, exhibiting plants, animals, and minerals found in the park, is open during the summer season.
Access for People with Disabilities
This activity or structure is ADA accessible. If you need an accommodation to participate in park activities due to a disability, please contact the park you plan to visit.
In an Emergency
Call 911 and contact a park employee.
Directions to the nearest hospital are posted on bulletin boards and at the park office.
UPMC Pinnacle Carlisle
361 Alexander Spring Road
Carlisle, PA 17015