Y Couloir and Vicinity Professional Review and Guide
"The Y and Y-Not are classic roadside couloirs. The Y is popular, but has flushed many folks. Choose a cool, dry day and watch for other parties. Y-Not is technical, given the 80-foot cliff. Coalpit IV is also a good chute to climb up, and several others down-canyon occasionally fill in enough to ski.
The Y Couloir and its evil twin, the Y-Not, are best climbed from the bottom when snow has settled for a number of days and temperatures are cool. Start early and be done by midday. Do not proceed up the Y when slus ff are coming down, either naturally or from parties above. Park at the Lisa Falls pullout, ski 300 feet down a now closed road, cross the Old Mill Trail, and cross Little Cottonwood Creek. Crossing is usually trivial in winter but can be gnarly in late spring—another reason not to visit the Y then!"