Black diamond Northstar, CA
Upper Grouse Alley drops 382 vertical feet over 1,268 feet of skiing, with a steepest pitch of 31° about 340 feet below the top. That's steeper than 65% of the 4,740 black diamond runs we've measured in North America, and the 4th steepest of 90 named runs at Northstar. It faces northeast.
Facing northeast at an average 18°, Upper Grouse Alley gets about 64% of the winter sun that flat ground at Northstar does, December through March. That's shadier than 80% of the runs we've measured, and the 9th shadiest named run at Northstar. Its top sits at 8,610 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.