Location: Ansonia to Blackwell, Pa. Details: Open dawn to dusk. Free. Length: 30 miles one way. Local color: This long but moderate trail skirts the western edge of Pine Creek Gorge in Tioga State Forest. You can peer 800 feet down and 2,000 feet across, taking in the wildlife and the foliage of the towering trees below. Through-hiking is popular, but day hikes are still worthwhile to get a taste of what is known as Pennsylvania's Grand Canyon.