Black diamond Breckenridge, CO
Tunnel drops 376 vertical feet over 3,208 feet of skiing, with a steepest pitch of 21° about 10 feet below the top. That's steeper than 10% of the 4,740 black diamond runs we've measured in North America, and the 155th steepest of 207 named runs at Breckenridge. It faces southeast.
Facing southeast at an average 7°, Tunnel gets about 116% of the winter sun that flat ground at Breckenridge does, December through March. That's sunnier than 84% of the runs we've measured, and the 31st sunniest named run at Breckenridge. Its top sits at 10,730 feet.
Angled toward the low winter sun, it bakes: powder turns heavy soon after a storm, and in spring it softens early in the day and refreezes hard overnight. 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.