Blue Keystone, CO
Thorne drops 83 vertical feet over 852 feet of skiing, with a steepest pitch of 10° about 10 feet below the top. That's steeper than 3% of the 5,615 blue runs we've measured in North America, and the 140th steepest of 140 named runs at Keystone. It faces north.
Facing north at an average 6°, Thorne gets about 86% of the winter sun that flat ground at Keystone does, December through March. That's sunnier than 54% of the runs we've measured, and the 58th sunniest named run at Keystone. Its top sits at 11,330 feet.
It gets an ordinary dose of sun: powder lasts a typical amount of time, and spring snow softens on a normal schedule. 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.