Blue A-Basin, CO
West Wall drops 245 vertical feet over 673 feet of skiing, with a steepest pitch of 31° about 140 feet below the top. That's steeper than 98% of the 5,615 blue runs we've measured in North America, and the 101st steepest of 161 named runs at A-Basin. It faces east.
Facing east at an average 22°, West Wall gets about 100% of the winter sun that flat ground at A-Basin does, December through March. That's sunnier than 71% of the runs we've measured, and the 31st sunniest named run at A-Basin. Its top sits at 12,060 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.