Blue Mammoth, CA
Stump Alley drops 741 vertical feet over 3,202 feet of skiing, with a steepest pitch of 19° about 1,440 feet below the top. That's steeper than 30% of the 5,615 blue runs we've measured in North America, and the 116th steepest of 151 named runs at Mammoth. It faces northeast.
Facing northeast at an average 14°, Stump Alley gets about 76% of the winter sun that flat ground at Mammoth does, December through March. That's shadier than 62% of the runs we've measured, and the 84th shadiest named run at Mammoth. Its top sits at 9,520 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.