Slippery Rock Gorge Trail
The Slippery Rock Gorge Trail, part of the New York-to-North Dakota North Country National Scenic Trail, extends from Hells Hollow to Eckert Bridge. A number of geologic features occur all along the trail. Those within Hells Hollow are described here.
The first part of the Slippery Rock Gorge Trail coincides with the Hells Hollow Trail, or parallels it across Hell Run. The geologic features along this part are the same as for the Hells Hollow Trail.
After the Slippery Rock Trail leaves the bank of Hell Run and enters a tributary hollow, it passes the entrance of another long abandoned coal mine. Where the trail crosses the stream, note the confluence of the orange stained stream flowing from the old mine (from the left looking upstream) versus the other stream. Again, the caved mine entrance is marked by the gray shale waste piles.
The trail then returns to the rim of Hells Hollow, where it passes well above Hells Hollow Falls, then into another tributary valley. As the trail follows the east side of this second tributary valley back towards Hells Hollow, you may notice cobbles and boulders of igneous and metamorphic rocks. These rocks, called erratics, are foreign to the bedrock in this area. They were glacially transported here from Canada.
When the trail once again reaches the rim of Hells Hollow, look to the right of the trail. Notice the natural bridge made of Vanport Limestone.
A little further along, the trail encounters another natural Vanport Limestone bridge. This time, the trail actually crosses over the natural bridge.