One Amazing Canyon. Imlay is one of the best canyons in Zion, if not THE best. The first descent required three days and was a feat of amazing bravery and chutzpah. With knowledge of the route, plus modern techniques and equipment, it is now a wonderful journey inside the stone, with pothole challenges that add spice.
From Potato Hollow on the West Rim, the "Full Imlay" route is a little longer than the sneak route, and can be done in two days, camping near the Crossroads where the Sneak route comes in; or in one day with an early start from the West Rim Trailhead.
While the lower two sets of narrows of Imlay are AMAZING, the upper half of the canyon is much like many other canyons in Zion.
First descent: June 7–9, 1978 by Mike Bogart, Mary Dern, & Dennis Turville.