Blue Big Sky, MT
Porcupine drops 146 vertical feet over 765 feet of skiing, with a steepest pitch of 19° about 460 feet below the top. That's steeper than 30% of the 5,615 blue runs we've measured in North America, and the 241st steepest of 290 named runs at Big Sky. It faces northeast.
Facing northeast at an average 11°, Porcupine gets about 74% of the winter sun that flat ground at Big Sky does, December through March. That's shadier than 65% of the runs we've measured, and the 103rd shadiest named run at Big Sky. Its top sits at 8,150 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.