Double black (extreme) Big Sky, MT
North Summit Snowfield drops 712 vertical feet over 1,520 feet of skiing, with a steepest pitch of 42° about 510 feet below the top. That's steeper than 81% of the 2,251 double black runs we've measured in North America, and the 30th steepest of 290 named runs at Big Sky. It faces north.
Facing north at an average 28°, North Summit Snowfield gets about 34% of the winter sun that flat ground at Big Sky does, December through March. That's shadier than 99% of the runs we've measured, and the 9th shadiest named run at Big Sky. Its top sits at 11,150 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.