4.5
(3)
44
hikers
6
hikes
Hiking in Colonel Denning State Park offers access to 273 acres of woodland and serves as a gateway to the larger Tuscarora State Forest. The park is situated in Doubling Gap, a distinctive geological feature where Blue Mountain doubles back on itself, providing varied terrain for exploration. At its heart lies the tranquil Doubling Gap Lake, while trails extend through diverse habitats including wetlands and rugged mountain paths.
Last updated: May 12, 2026
2
hikers
4.11km
01:28
360m
50m
Embark on the Flat Rock Trail for a moderate hiking experience that takes you through a lush forest. This 2.6-mile (4.1 km) route involves a continuous uphill climb, gaining 1182…
2
hikers
3.02km
00:47
20m
20m
Enjoy an easy hike on the Doubling Gap Nature Trail, a pleasant loop winding through a mixed hardwood forest. The path offers picturesque views of Doubling Gap Lake and follows…

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5.69km
02:02
430m
160m
Hike the moderate 3.5-mile Flat Rock Loop Trail in Colonel Denning State Park, gaining 1419 feet in about 2 hours.
4.0
(1)
10
hikers
7.30km
02:31
390m
390m
Hike the moderate 4.5-mile Flat Rock Loop Trail in Colonel Denning State Park, featuring steep and rocky sections with 1285 feet of elevatio
5.0
(2)
28
hikers
7.06km
02:27
390m
390m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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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.
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The Flat Rock Trail is a popular trail that takes you up to a viewpoint at Flat Rock. The trail is challenging as there is a lot of elevation gain, but it is worth the effort for the views at the top.
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Colonel Denning State Park offers a variety of hiking experiences with 6 distinct trails listed on komoot. These range from easy strolls to more challenging ascents, providing options for different fitness levels. You'll find 1 easy trail and 5 moderate trails to explore within the park.
Yes, for families or those seeking a gentler walk, the Doubling Gap Nature Trail is an excellent choice. This easy, self-guided one-mile loop around Doubling Gap Lake features informational panels about the area's natural history and is known for beautiful wildflowers in spring. It's a great way to enjoy nature without a strenuous climb.
For breathtaking panoramic views, the Flat Rock Trail is highly recommended. This trail leads to Flat Rock, a natural rock outcrop at the top of Blue Mountain, offering a stunning 180-degree vista of the Cumberland Valley. It's particularly spectacular during fall foliage and hawk migration season.
Yes, pets are permitted in designated day-use areas and on designated trails within Colonel Denning State Park. Always ensure your dog is on a leash and that you clean up after them to help keep the park enjoyable for everyone. For specific regulations, you can check the official PA DCNR website.
Colonel Denning State Park offers enjoyable hiking throughout the year, but spring and fall are particularly popular. In spring, the wetlands along Doubling Gap Lake burst with wildflowers. Fall provides spectacular foliage views, especially from Flat Rock, and is ideal for hawk migration observation. Summer is great for combining hikes with swimming or boating, while winter offers opportunities for cross-country skiing and ice skating when conditions permit.
Yes, Colonel Denning State Park features several loop options. A popular choice is the Flat Rock Loop Trail, which combines the scenic Flat Rock ascent with a return route, offering a comprehensive hiking experience with rewarding views. Another variation of this loop is also available, providing a slightly longer option.
The most challenging hikes in the park typically involve the ascent to Flat Rock. Trails like the Flat Rock Trail and its various loop extensions are considered moderate due to their significant elevation gain (up to 432 meters) and rocky terrain. These trails require good physical condition and appropriate footwear.
Yes, Colonel Denning State Park provides ample parking facilities for visitors. The main parking areas are conveniently located near the Doubling Gap Lake and trailheads, making it easy to access the various hiking routes and recreational amenities within the park.
While hiking in Colonel Denning State Park, you can expect to encounter diverse wildlife such as squirrels, deer, and turkeys, especially in the park's extensive woodlands. The park is also a great spot for birdwatching. Key natural features include the unique "S" turn of Doubling Gap, the tranquil Doubling Gap Lake, and the rugged terrain leading to the Flat Rock overlook. The park's connection to the Tuscarora State Forest also opens up vast areas of natural beauty.
The komoot community highly rates the hiking experiences in Colonel Denning State Park, with an average score of 4.5 stars. Reviewers often praise the rewarding panoramic views from Flat Rock, the peaceful atmosphere around Doubling Gap Lake, and the well-maintained trails that offer a good mix of challenge and accessibility. The park's connection to the larger Tuscarora State Forest is also appreciated for expanding exploration opportunities.
Absolutely. Colonel Denning State Park serves as a crucial gateway to the much larger Tuscarora State Forest, which offers an additional 13 trails and 18 miles of hiking. Furthermore, the park connects to the extensive 252-mile Tuscarora Trail, a bypass route of the Appalachian Trail, with approximately 23 miles crossing the Tuscarora State Forest. This provides significant opportunities for longer, multi-day hiking adventures for experienced trekkers.


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