Black diamond Copper, CO
Rosi's Run drops 1,142 vertical feet over 3,893 feet of skiing, with a steepest pitch of 27° about 1,420 feet below the top. That's steeper than 33% of the 4,740 black diamond runs we've measured in North America, and the 63rd steepest of 141 named runs at Copper. It faces north.
Facing north at an average 17°, Rosi's Run gets about 60% of the winter sun that flat ground at Copper does, December through March. That's shadier than 84% of the runs we've measured, and the 12th shadiest named run at Copper. Its top sits at 10,860 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.