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Hiking trails & Routes
United States
Pennsylvania
Cumberland County

Flat Rock Loop Trail

Moderate

3.2

(3)

54

hikers

Flat Rock Loop Trail

02:02

5.69km

430m

Hiking

Hike the moderate 3.5-mile Flat Rock Loop Trail in Colonel Denning State Park, gaining 1419 feet in about 2 hours.

Last updated: February 26, 2026

Waypoints

A

Colonel Denning State Park

Highlight • Rest Area

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 …

Tip by

4.12 km

Flat Rock

Peak

B

5.69 km

End point

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Way Types & Surfaces

Way Types

5.55 km

< 100 m

< 100 m

Surfaces

5.62 km

< 100 m

< 100 m

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Elevation

Elevation

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Weather

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Today

Tuesday 7 July

25°C

19°C

94 %

Additional weather tips

Max wind speed: 12.0 km/h

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Frequently Asked Questions

How long does it take to hike the Flat Rock Loop Trail?

The Flat Rock Loop Trail is a relatively short hike, typically taking between 30 minutes to an hour to complete, depending on your pace and how long you stop to enjoy the views.

What is the terrain like on the Flat Rock Loop Trail?

The trail begins as a wooded path with roots and small rocks. As you gradually ascend, the path transitions to smoother stone or granite slabs, especially at the summit. The summit features a massive outcrop of Quartzite interlaced with ribbons of white quartz.

Is the Flat Rock Loop Trail suitable for beginners or families?

Yes, the trail is generally considered easy to easy-to-moderate and is suitable for most fitness levels, including families. While there are initial uphill sections with rocks and roots, the overall length and gradual ascent make it accessible. It's a great choice for those seeking a scenic, shorter hike.

Where can I park for the Flat Rock Loop Trail?

The trailhead is easily identifiable with a large parking area, making it a convenient stop. Look for signage indicating the Flat Rock Loop Trail within Colonel Denning State Park.

What can I see along the route and are there any viewpoints?

Hikers are treated to spectacular panoramic views of the surrounding mountains. The trail itself is a self-guiding nature trail with informative plaques detailing the local ecosystem, geology, and plant life. At the summit, you'll find unique 'bathtub' pools formed in the rock and an expansive, flat rock summit that's perfect for picnics.

Does the Flat Rock Loop Trail intersect other well-known paths?

Yes, the komoot route that incorporates the Flat Rock Loop Trail also passes through sections of the Tuscarora Trail, Lehman Trail, and Tuscalachian Loop.

Is the Flat Rock Loop Trail dog-friendly?

Yes, dogs are generally permitted on trails within Colonel Denning State Park, but they must be kept on a leash at all times. Please remember to pack out any waste.

Do I need a permit or pay an entrance fee for Colonel Denning State Park?

Generally, there are no entrance fees to access Colonel Denning State Park or hike the Flat Rock Loop Trail. However, specific activities or facilities within the park might require permits or fees, so it's always a good idea to check the park's official website for the latest regulations before your visit.

What is the best time of year to hike the Flat Rock Loop Trail?

The trail is enjoyable in spring, summer, and fall. Spring brings lush wildflowers, while fall offers vibrant foliage. It can be hiked year-round, but winter conditions may include ice or snow, requiring appropriate gear. The trail is often less crowded than other trails in the area, offering a tranquil experience.

What kind of wildlife might I encounter?

The wooded environment of the trail supports various local wildlife. While specific sightings are never guaranteed, you might spot common forest animals like deer, squirrels, and a variety of bird species. Always observe wildlife from a distance and do not feed them.

What should I wear or bring for this hike?

Given the varied terrain with roots and rocks, sturdy hiking shoes are recommended. Dress in layers suitable for the weather, and consider bringing water, snacks, and a camera to capture the panoramic views. Informative plaques are along the self-guiding nature trail, so you don't need a separate guide.

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