Tillman Brook starts on the western slope of Kittatinny Ridge and flows down to the Flatbrook. The water flows across High Falls formation of green and red sandstone which create the ravine. The trails follow the stream down steep slopes blanketed with hemlocks and moss covered rocks. A long series of falls and cascades create a wild and scenic view. Many people visit the ravine in summer since it remains cooler here under the hemlocks than other areas of the forest.
Early spring is also a great time to visit.
You may have the entire place to yourself. Black bears live all along the Kittatinny Ridge. They are not dangerous unless they become used to people. So for their safety, as well as yours, don't leave food unattended. After a picnic put the food back in the trunk of your car before going on a hike.