Black diamond Keystone, CO
Christmas Tree drops 560 vertical feet over 1,724 feet of skiing, with a steepest pitch of 29° about 10 feet below the top. That's steeper than 47% of the 4,740 black diamond runs we've measured in North America, and the 38th steepest of 140 named runs at Keystone. It faces west.
Facing west at an average 19°, Christmas Tree gets about 97% of the winter sun that flat ground at Keystone does, December through March. That's sunnier than 68% of the runs we've measured, and the 49th sunniest named run at Keystone. Its top sits at 11,980 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.