Blue Copper, CO
Upper Sluice drops 198 vertical feet over 713 feet of skiing, with a steepest pitch of 26° about 300 feet below the top. That's steeper than 85% of the 5,615 blue runs we've measured in North America, and the 67th steepest of 141 named runs at Copper. It faces east.
Facing east at an average 16°, Upper Sluice gets about 100% of the winter sun that flat ground at Copper does, December through March. That's sunnier than 71% of the runs we've measured, and the 27th sunniest named run at Copper. Its top sits at 11,590 feet.
With little slope to hide behind, it takes nearly the full winter sun of open ground: powder settles and turns heavy sooner after a storm, and spring snow softens early. 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.