Double black (off-piste) Stevens Pass, WA
Tye Cliffs/Chutes drops 444 vertical feet over feet of skiing, with a steepest pitch of 51°. That's steeper than 100% of the 2,251 double black runs we've measured in North America, and the 1st steepest of 70 named runs at Stevens Pass. It faces northwest.
Measured by ZRankings from 1-meter USGS lidar. Steepest pitch is the steepest stretch of about 50 vertical feet along the skiable line. Run lines come from OpenStreetMap and can sit a little off the skied path.