Green Keystone, CO
The Alley drops 316 vertical feet over 1,976 feet of skiing, with a steepest pitch of 13° about 10 feet below the top. That's steeper than 42% of the 3,109 green runs we've measured in North America, and the 131st steepest of 140 named runs at Keystone. It faces north.
Facing north at an average 9°, The Alley gets about 77% of the winter sun that flat ground at Keystone does, December through March. That's shadier than 59% of the runs we've measured, and the 68th shadiest named run at Keystone. Its top sits at 10,820 feet.
It gets an ordinary dose of sun: powder lasts a typical amount of time, and spring snow softens on a normal schedule. Shading from ridges and trees isn't counted yet.
under 25°25–35°35–45°45°+ Hover to follow the line on the map.
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.