Obtaining a Tunnel Permit
Have your vehicle measured at the entrance station when you arrive at the park. Any vehicle that is 7 feet 10 inches (2.4 meters) in width and/or 11 feet 4 inches (3.4 meters) in height or larger is required to have a tunnel permit.
Pay $15.00, in addition to the park entrance fee, for the tunnel permit at the entrance station before proceeding to the tunnel.
Drive to the tunnel during the tunnel hours of operation (posted seasonally).
Tunnel traffic control will be provided by friendly NPS rangers.
Your $15.00 tunnel permit is good for two trips through the tunnel for the same vehicle within seven days of purchase.
Prohibited Vehicles
Vehicles over 13 feet 1 inch tall, Semi-trucks, vehicles carrying hazardous materials, vehicles weighing more than 50,000 pounds, single vehicles over 40 feet long, combined vehicles over 50 feet long. All Bicycles. Pedestrians.