Black diamond Sun Valley, ID
Upper Greyhawk drops 444 vertical feet over 906 feet of skiing, with a steepest pitch of 33° about 50 feet below the top. That's steeper than 76% of the 4,740 black diamond runs we've measured in North America, and the 8th steepest of 99 named runs at Sun Valley. It faces north.
Facing north at an average 29°, Upper Greyhawk gets about 34% of the winter sun that flat ground at Sun Valley does, December through March. That's shadier than 99% of the runs we've measured, and the shadiest named run at Sun Valley. Its top sits at 7,490 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.