By Fede from komoot
·
Updated May 10, 2026
If you've ever tried to plan hiking in Mcconnells Mill State Park, you know how quickly the options can feel overwhelming. With so many trails crisscrossing the rugged landscape, it's tough to tell which routes are genuinely worth your time and which might just be filler. That's where we come in. Our komoot community has walked, mapped, and reviewed these trails, so we've done the legwork to bring you a curated shortlist of the very best, saving you the guesswork.
Hiking in Mcconnells Mill State Park is all about the dramatic Slippery Rock Creek Gorge, a truly unique landscape carved by ancient glaciers. Expect steep-sided walls, massive boulders, and exposed rock formations, all punctuated by numerous waterfalls and shaded by old-growth forests. The trails here range from easy strolls to more demanding treks, often featuring rocky terrain. If you plan to visit the historic gristmill, remember it's typically open from Memorial Day through late September.
If you only do one hike, make it the Slippery Rock Gorge and Kildoo Trail Loop, a moderate 6.9 miles (11.1 km) route that perfectly captures the park's varied terrain and stunning gorge views. For a family-friendly win or a quick taste of the park's beauty, the easy Kildoo Trail at 3.8 miles (6.1 km) is a fantastic choice, taking you past the creek, gristmill, and covered bridge. Ready to explore? Dive into these routes and more with komoot.
Trail | Distance | Elevation | Difficulty |
|---|---|---|---|
| Slippery Rock Gorge and Kildoo Trail Loop | 11.1 km | 170 m | Moderate |
| Hell's Hollow Trail | 791 m | 0 m | Easy |
| Kildoo Trail | 6.12 km | 90 m | Easy |
| McConnells Mill State Park loop from McConnells Mill State Park | 3.99 km | 60 m | Easy |
| McConnells Mill State Park loop from Hells Hollow Falls | 9.71 km | 160 m | Moderate |
| McConnells Mill State Park loop from Rose Point | 2.65 km | 40 m | Easy |
| McConnells Mill State Park loop from Slippery Rock Township | 18.9 km | 310 m | Hard |
| North Country Trail | 2.74 km | 50 m | Easy |
| Under US 422 – View of Lake Arthur loop from Moraine State Park Dam | 4.54 km | 40 m | Easy |
| North Country National Scenic Trail | 11.2 km | 110 m | Moderate |
Sign up to see all 10 routes
Sign up for free
11.1km
03:03
170m
170m
The Slippery Rock Gorge and Kildoo Trail Loop offers a truly immersive hiking experience through a rugged landscape. You'll find yourself navigating a path that closely follows the wild Slippery Rock Creek, with continuous views of its rapids and whitewater, all within the stunning Slippery Rock Gorge. Expect a mix of terrain, from
View route
791m
00:12
0m
10m
The Hell's Hollow Trail offers a delightful, short escape into the scenic beauty of McConnells Mill State Park. You'll wander through a lush, tree-lined forest, following the gentle Hell Run as it tumbles over small cascades and past unique rock formations. The path culminates at the stunning Hell's Hollow Falls, a 15-foot tall and 20-foot wide waterfall that's a true natural gem.
This easy 0.5-mile (0.8 km) hike, with 0 feet (0 metres) of elevation gain, takes only about 12 minutes to reach the falls, making it a fantastic option for families or anyone seeking a quick nature fix. While the trail itself is mostly flat packed dirt, be prepared for a short descent via a staircase and some potentially slippery rocks right at the waterfall's base. Good grip on your shoes is a must, especially in damp conditions.
Beyond the natural beauty, the area holds a fascinating history, with remnants of an old iron furnace and a lime kiln near the falls. These historical structures are even believed to be the origin of the area's evocative name. The trail is also dog-friendly, provided your furry friend stays on a leash, and it's a great way to experience the dramatic Slippery Rock Creek Gorge, carved by glacial activity thousands of years ago.
View route
6.12km
01:40
90m
90m
The Kildoo Trail offers a delightful journey through McConnells Mill State Park, tracing the lively Slippery Rock Creek. You'll find yourself amidst green woods, passing numerous small waterfalls, and eventually reaching the impressive Kildoo Falls, where you can even walk behind the water. The terrain varies from smooth to rocky and root-filled, with gentle ups and downs, making this 3.8-mile (6.1 km) hike a scenic adventure.
This easy route, with only 286 feet (87 metres) of elevation gain, typically takes about 1 hour and 39 minutes to complete. It's a great option for families and is dog-friendly, provided your furry friend stays on a leash. Parking is available at the state park, and while the trail is generally easy, good hiking boots are recommended due to the varied and sometimes uneven surfaces.
Beyond the natural beauty, the Kildoo Trail is rich in history, connecting you to the historic McConnells Mill and a picturesque covered bridge. You'll also find unique opportunities to access large boulders within the creek's rapids, offering different viewpoints. This trail is a fantastic way to experience the natural and historical landmarks of the region, especially during spring wildflowers or vibrant fall foliage.
View route
Sign up for free
3.99km
01:06
60m
60m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
View route
9.71km
02:40
160m
160m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
View route
2.65km
00:43
40m
40m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
View route
18.9km
05:13
310m
310m
The McConnells Mill State Park loop from Slippery Rock Township is a demanding 11.8-mile (18.9 km) hike that plunges you into the heart of a dramatic glacial-carved gorge. You'll follow the Slippery Rock Creek, witnessing whitewater rapids, carved sandstone formations, and several waterfalls like Kildoo Falls and Hell's Hollow Falls. Expect rugged terrain with plenty of rocks and roots underfoot, making for a truly immersive and challenging experience through dense hemlock forests.
Planning your visit means preparing for a difficult route that takes about 5 hours and 13 minutes to complete, with 1015 feet (309 metres) of elevation gain. Parking is typically available near the historic gristmill or covered bridge, which serve as excellent starting points for this combined trail adventure. Always wear sturdy hiking boots, as the paths can be slippery, especially after rain, and consider visiting in spring to catch the wildflowers and fuller waterfalls.
This area is a National Natural Landmark, showcasing a unique ecosystem shaped by ancient glaciers, evident in the massive boulders and deep gorges. Beyond the natural beauty, the park also features a charming 19th-century gristmill and an 1875 covered bridge, adding a touch of history to your hike. Portions of this loop are also part of the extensive North Country National Scenic Trail, highlighting its significance in the regional trail network.
View route
2.74km
00:44
50m
20m
This easy section of the North Country Trail offers a delightful, accessible walk, perfect for a quick escape into nature. You'll traverse a well-maintained path, enjoying the surrounding greenery before reaching a pleasant viewpoint overlooking Lake Arthur. The route also takes you beneath the impressive US 422 bridge, adding a unique structural landmark to the natural scenery. It's a great option for families or anyone seeking a gentle outdoor experience.
Planning your visit to this trail is straightforward; it's an easy 1.7-mile (2.7 km) hike with only 149 feet (45 metres) of elevation gain, typically taking around 44 minutes. Parking is usually available at the trailhead, making it convenient for a spontaneous outing. While accessible year-round, consider visiting in spring or autumn for the most comfortable weather and picturesque views. No special permits are required for this segment.
This short hike provides a small taste of the monumental North Country Trail, the longest National Scenic Trail in the United States, stretching across eight states. While this segment is easy, the NCT itself is known for its incredible diversity, ranging from vast prairies to Great Lakes shorelines and low mountains. It's a testament to volunteer efforts and connects to other major long-distance routes, showcasing America's natural and cultural heritage.
View route
4.54km
01:11
40m
40m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
View route
11.2km
02:57
110m
110m
This segment of the North Country National Scenic Trail offers a delightful journey through the varied landscapes of Butler County, Pennsylvania. You'll find yourself immersed in dense woodlands, with the path occasionally opening up to reveal broader vistas, including a notable View of Lake Arthur. The trail's character shifts between shaded forest paths and more open sections, providing a dynamic hiking experience that showcases the natural features of the region.
Planning your hike on this moderate 6.9-mile (11.2 km) section, which involves 355 feet (108 metres) of elevation gain and takes just under 3 hours, is relatively simple. Trailhead parking is typically available, but it's wise to arrive early, especially during peak times, to ensure a spot. The best time to hike is during the spring or fall for comfortable temperatures and beautiful scenery, though summer offers lush green views. No special permits are usually required for day hikes on this part of the trail.
As part of the longest National Scenic Trail in the country, this section provides a taste of the immense diversity the North Country Trail offers, from its extensive forests to its proximity to waterways. It's a testament to the volunteer efforts that maintain this vast network, connecting hikers to the natural and cultural history of the northern U.S. This segment is an excellent choice for those seeking a rewarding day hike with accessible terrain and scenic viewpoints.
View route
Get access to more routes and recommendations from other explorers.
Sign up for free
Already have an account?
McConnells Mill State Park, located on 2,546 acres, features the striking Slippery Rock Creek Gorge, a National Natural Landmark formed by glacial lake drainage. The gorge is known for its steep sides, boulderous valley, and scenic overlooks and waterfalls. The park also offers tours of a historic gristmill and a covered bridge from the 1800s. Open year-round from sunrise to sunset, the park's day-use areas close at dusk.
1
0
The McConnell's Mill Covered Bridge, built in 1874, stretches across Slippery Rock Creek. This wooden bridge, constructed using the Howe truss design, rests on a stone foundation and is reinforced by steel. It is one of only four remaining Howe truss bridges in Pennsylvania. The bridge was added to the National Register of Historic Places in 1980.
0
0
Daniel Kennedy opened a gristmill on Slippery Rock Creek in 1852. The mill was rebuilt after a fire in 1868. McConnell acquired the mill in 1875, replacing the waterwheel with turbines and grindstones with rolling mills, making it one of the first of its kind in the country. The mill ground various grains until it closed in 1928. The ownership passed to the Commonwealth of Pennsylvania in 1957, leading to the formal dedication of McConnells Mill State Park. Today is the mill. Today, interpretive tours of the historic mill are available at 1:00 p.m. and 2:00 p.m. in the summer. For interpretive tours for groups, call the Moraine Park office at 724-368-8811.
0
0
Old water operated mill with dam. Open during the summer.
1
0
The trail to this fall is not on most maps, just keep walking down the gorge opposite of the North Country trail. You will have to turn around and backtrack after visiting the fall. There are some markers leading up to the falls. Be safe.
1
0
Yes, dogs are welcome in McConnells Mill State Park but must be kept on a leash and under physical control at all times. The trails can be rocky and steep in places, so ensure your dog is comfortable with challenging terrain.
The park is famous for its waterfalls. The Hells Hollow Trail is a short, scenic path leading to Hell's Hollow Falls. For a view of the impressive 60-foot Alpha Falls, you can take the Alpha Pass Trail. The Kildoo Trail also features several smaller, charming waterfalls along the creek.
For a relatively short and straightforward walk suitable for many families, consider the McConnells Mill State Park loop from McConnells Mill State Park. It's a gentle 2-mile (3.2 km) walk that gives you a great feel for the park's scenery without significant elevation changes.
If you're looking for a demanding trek, the McConnells Mill State Park loop from Ellport is the most difficult route in this collection. At 13.5 miles (21.7 km), it requires significant stamina and navigating the park's rugged and varied terrain.
Yes, the McConnell’s Mill Trail & Kildoo Trail loop is a popular route that takes you directly past the historic McConnell's Mill and across the picturesque covered bridge over Slippery Rock Creek.
Hiking along Slippery Rock Creek is a dramatic experience. The trails follow the deep, steep-sided gorge, which is a National Natural Landmark. You'll navigate through dense forests, scramble over house-sized boulders, and enjoy constant views of the rushing creek below.
A great option for a moderately challenging hike is the McConnells Mill State Park loop from Portersville. This 8.8-mile (14.1 km) trail offers a longer exploration of the park's forests and varied terrain than the shorter loops, providing a solid workout with beautiful scenery.
Yes, hiking in winter offers a unique perspective of the gorge and its frozen waterfalls. However, the trails can be extremely icy and slippery. It is crucial to wear appropriate footwear with traction devices like microspikes and to dress in warm layers.
Parking is available at several locations throughout the park. For the Hells Hollow Trail, there is a dedicated parking area off Shaffer Road. For trails around the historic mill, like the Kildoo Trail, you can find parking near the gristmill and the covered bridge. Arrive early on weekends as lots can fill up quickly.
McConnells Mill offers a more rugged and challenging hiking experience, defined by its steep, rocky gorge. Moraine State Park, by contrast, features gentler, rolling hills and trails that primarily circle Lake Arthur, like the Under US 422 – View of Lake Arthur loop. Choose McConnells Mill for dramatic gorge scenery and Moraine for lakeside views.
The trails are highly regarded by the komoot community. Reviewers frequently praise the stunning gorge scenery, the well-maintained paths, and the satisfying challenge of the rocky terrain. The mix of waterfalls, forests, and historic landmarks makes it a favorite destination.
McConnells Mill State Park is also a popular spot for other outdoor pursuits. Experienced kayakers can tackle the whitewater rapids of Slippery Rock Creek. The park is also one of the few in Pennsylvania that permits rock climbing and rappelling in designated areas. Fishing and picnicking are other popular activities.
