State Route 9 (SR-9) is a state highway in southern Utah, serving Zion National Park. It starts at the western terminus at exit 16 on I-15, passing through Zion National Park, and ending at the eastern junction with US-89. The entire length of the highway has been designated the Zion Park Scenic Byway. There is a fee to travel through Zion National Park, but the Zion-Mt. Carmel Highway is open to private vehicles year-round.