Blue Purgatory, CO
666 drops 223 vertical feet over 951 feet of skiing, with a steepest pitch of 30° about 550 feet below the top. That's steeper than 95% of the 5,615 blue runs we've measured in North America, and the 38th steepest of 90 named runs at Purgatory. It faces north.
Facing north at an average 14°, 666 gets about 71% of the winter sun that flat ground at Purgatory does, December through March. That's shadier than 70% of the runs we've measured, and the 23rd shadiest named run at Purgatory. Its top sits at 9,800 feet.
Shaded snow stays colder and drier, so it holds powder longer after a storm and is slower to crust over or turn to slush in spring. 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.