"Part of the North Country National Scenic Trail, this is without a doubt one of the most challenging hikes you can do. Though just more than 6.0 miles long, it is very steep, particularly in the northeastern end of McConnells Mill State Park, near Eckert Bridge. It’s worth visiting, though. Slippery Rock Gorge is a place of dramatic scenery— but you’ll want to do this as a shuttle hike.
Slippery Rock Gorge is as magnificent a site as you will see anywhere. Deep, with Slippery Rock Creek pouring over giant boulders, fast enough to qualify as whitewater, it’s a place of awe-inspiring scenery. Hiking it, though, is equally extreme.
You’ll have to make several steep climbs—you climb and drop, climb and drop more than once—on trails that can be narrow, so caution is in order here. This shouldn’t be your first hike, either. Tackle this one only after you’ve worked yourself into shape elsewhere."