From Wheeler Canyon
trail (starting at Pineview Dam), continue south approximately one mile to a wooden sign. Icebox Canyon descends sharply right to the watercourse, crossing a wooden bridge.
From Wheeler Creek Trail
(Snowbasin Lot 2), continue east just past the junction with Middle Fork. The Icebox Canyon turnoff is a couple hundred feet past this, and is marked with wooden signage.
This is a fun shortcut - it has rock gardens, tree obstacles, decent exposure, some tight hairpins, and some extremely steep sections - all following a densely forested watercourse. It's only a mile, but it's a fun mile.