Double black Big Sky, MT
Firehole drops 1,049 vertical feet over 1,819 feet of skiing, with a steepest pitch of 45° about 940 feet below the top. That's steeper than 90% of the 2,251 double black runs we've measured in North America, and the 22nd steepest of 290 named runs at Big Sky. It faces north.
Facing north at an average 36°, Firehole gets about 29% of the winter sun that flat ground at Big Sky does, December through March. That's shadier than 100% of the runs we've measured, and the 3rd shadiest named run at Big Sky. Its top sits at 9,970 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.