Blue Buttermilk, CO
Ptarmigan drops 975 vertical feet over 3,911 feet of skiing, with a steepest pitch of 22° about 1,370 feet below the top. That's steeper than 52% of the 5,615 blue runs we've measured in North America, and the 17th steepest of 41 named runs at Buttermilk. It faces northeast.
Facing northeast at an average 15°, Ptarmigan gets about 66% of the winter sun that flat ground at Buttermilk does, December through March. That's shadier than 77% of the runs we've measured, and the 7th shadiest named run at Buttermilk. Its top sits at 9,720 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 USGS lidar (1-meter where it exists, coarser elsewhere). 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.