8.1 mi · 606 ft gain
Strenuous Point to point Permit required
A technical canyoneering route (rated 3B III) down the Left Fork of North Creek, named for the tube-shaped slot at its heart. The top-down version from Wildcat Canyon to the Left Fork trailhead involves rappels, downclimbing, route-finding, and several cold swims, so it calls for canyoneering gear and experience. Every route through the Subway needs a Zion wilderness permit, issued by lottery on Recreation.gov. A non-technical bottom-up day hike reaches the formation from the Left Fork trailhead — still permitted, no rappels, but a long rock-hop with stream crossings.