The Subway, Slot canyon in Washington County, United States.

The Subway is a slot canyon in the Zion Wilderness of Zion National Park, in northeastern Washington County, Utah. It is a section of less than 0.25 miles (0.40 km) of the larger Great West Canyon, which lies between the North Guardian Angel and the South Guardian Angel on the Kolob Plateau. The Left Fork North Creek flows through it, and its tube-like, undercut walls give the canyon its name.

This canyon formed through water erosion over millions of years as the creek cut through the Great West Canyon landscape between the Guardian Angels formations. The continuous flow reshaped the rock into its distinctive tubular structure.

Photographers and outdoor enthusiasts travel from across the globe to capture images of the natural rock formations and cascading waterfalls.

A Wilderness permit is required and can be obtained at the Zion Canyon Visitor Center; permits are hard to get in peak months. Two routes exist: the through route from Wildcat Canyon Trailhead, one-way downstream for advanced hikers, and the easier lower entry from Left Fork Trailhead. Both trailheads sit just off Kolob Terrace Road.

The canyon is a short section, under 0.25 miles (0.40 km), of the larger Great West Canyon, which lies between the North Guardian Angel and South Guardian Angel peaks on the Kolob Plateau. The Left Fork North Creek runs through it, and the name comes from the tube-like, undercut shape of the slot.