Zion-Mount Carmel Tunnel
For vehicles traveling along Highway 9, the Zion-Mount Carmel Tunnel gives direct access between Bryce Canyon, Zion and Grand Canyon national parks. When it was completed in 1930, the 1.1-mile tunnel was the longest of its kind in the country. Due to size restrictions, people driving RVs or other large vehicles must stop at the entrance station and get their vehicles measured if they plan to drive through the tunnel. If the vehicle fits in the tunnel, a $15 fee must be paid for rangers to convert two-way tunnel traffic to one-way for larger vehicles. Large vehicles may only travel through the tunnel at certain times of the day. No pedestrians or bicyclists are permitted in the tunnel.