Black diamond Aspen Mountain, CO
Reds Run drops 565 vertical feet over 1,409 feet of skiing, with a steepest pitch of 33° about 240 feet below the top. That's steeper than 76% of the 4,740 black diamond runs we've measured in North America, and the 66th steepest of 139 named runs at Aspen Mountain. It faces northeast.
Facing northeast at an average 24°, Reds Run gets about 74% of the winter sun that flat ground at Aspen Mountain does, December through March. That's shadier than 65% of the runs we've measured, and the 69th shadiest named run at Aspen Mountain. Its top sits at 10,700 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.