Join geologist Nick S. on a moderately strenuous hike along the Knoll Trail, which runs along the base of the escarpment from Oak Creek Canyon to close to Pine Creek Canyon. We will take the Arnight Trail from the trailhead to the junction with the Knoll Trail. This is a rough trail with lots of ups and downs as we cross the ravines. The Knoll Trail goes along the Wilderness Boundary. Great views of the Wilson Cliffs sandstone escarpment. We will discuss the geology and plants and animals encountered on the trail. Moderately strenuous. Ages 10+. Limited space/reservations required. For more information or to register, please call (702) 515-5367.