The Subway is a colloquial name for a uniquely-shaped slot canyon in Zion National Park. The Subway is so named for its tube-like, undercut slot canyons. This segment of canyon is less than a quarter-mile in length, but long approach and exit hikes are necessary for access.
Left Fork (Subway) Bottom-Up Hiking Route:
This is a very strenuous 9-mile round-trip hike through...