Cabot Visitor Center Hours: Year around Motorcoaches Directions: I-89 Exit 8 Montpelier, Rte. 2 East. At Marshfield, left on Rte. 215. I-91 Exit 21, St. Johnsbury, Rte. 2 West, at Marshfield, right on Rte. 215. What You'll See: Guided tour ...