Black diamond Mammoth, CA
Drop 18 drops 282 vertical feet over 643 feet of skiing, with a steepest pitch of 36° about 180 feet below the top. That's steeper than 87% of the 4,740 black diamond runs we've measured in North America, and the 33rd steepest of 151 named runs at Mammoth. It faces east.
Facing east at an average 26°, Drop 18 gets about 77% of the winter sun that flat ground at Mammoth does, December through March. That's shadier than 60% of the runs we've measured, and the 90th shadiest named run at Mammoth. Its top sits at 9,260 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.