Black diamond Big Sky, MT
Blackrock Gully drops 400 vertical feet over 904 feet of skiing, with a steepest pitch of 41° about 200 feet below the top. That's steeper than 97% of the 4,740 black diamond runs we've measured in North America, and the 36th steepest of 290 named runs at Big Sky. It faces northeast.
Facing northeast at an average 27°, Blackrock Gully gets about 64% of the winter sun that flat ground at Big Sky does, December through March. That's shadier than 79% of the runs we've measured, and the 51st shadiest named run at Big Sky. Its top sits at 9,560 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.