This loop at the Mohonk Preserve is one of our favorites - a trail with two personalities. The Undercliff section takes you beneath towering cliff faces through a cool, shaded corridor. Then the Overcliff section brings you up top with sweeping views of the valley below. It's like getting two hikes in one.
The trail is about 5 miles and moderately challenging. There are some rocky sections and elevation changes, but nothing that should worry a reasonably fit hiker. We found the terrain varied enough to keep things interesting the whole way.
The cliff-edge views from the Overcliff portion are spectacular. We stopped at several overlooks and each one seemed better than the last. On our fall visit, the foliage was so bright it almost looked unreal. This is definitely one of those trails where you'll burn through your phone's camera roll.
The path is generally well-marked, though we'd recommend paying attention at the transition points between the two trail sections. Arrive early for parking, especially during fall foliage season - the Mohonk Preserve is popular for good reason. We love this hike for a half-day outing when we want something beautiful without a massive commitment.