Double black Sierra-At-Tahoe, CA
Chair Line (unofficial) drops 666 vertical feet over 2,020 feet of skiing, with a steepest pitch of 39° about 740 feet below the top. That's steeper than 66% of the 2,251 double black runs we've measured in North America, and the 1st steepest of 50 named runs at Sierra-At-Tahoe. It faces northwest.
Facing northwest at an average 20°, Chair Line (unofficial) gets about 76% of the winter sun that flat ground at Sierra-At-Tahoe does, December through March. That's shadier than 61% of the runs we've measured, and the 20th shadiest named run at Sierra-At-Tahoe. Its top sits at 8,800 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.