Clear Fork Gorge is situated along the Mohican State Scenic River, in Ashland County. The gorge is one thousand feet wide and over three hundred feet deep, and was formed when glacial meltwater cut through the sandstone bedrock that forms its steep walls.

The landscape has changed little since pioneer legend Johnny Appleseed tended his apple orchards nearby in the early 19th century. Its seclusion has preserved a rare forest community, including native white pine and towering eastern hemlock. The gorge also displays a wide variety of tree species more common to Ohio, with sycamore on the bottomlands, beech, ash, and tulip farther up the slopes, and oak and maple on the ridges above.

Clear Fork Gorge became a National Natural Landmark in 1967, and today its breathtaking views can be seen from the Gorge Overlook, one of the many features of the Mohican State Park.