Double black Mammoth, CA
Kiwi Flat drops 556 vertical feet over 859 feet of skiing, with a steepest pitch of 66° about 80 feet below the top. That's steeper than 100% of the 2,251 double black runs we've measured in North America, and the 1st steepest of 151 named runs at Mammoth. It faces north.
Facing north at an average 42°, Kiwi Flat gets about 31% of the winter sun that flat ground at Mammoth does, December through March. That's shadier than 99% of the runs we've measured, and the 3rd shadiest named run at Mammoth. Its top sits at 10,240 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.