Black diamond Keystone, CO
Two If By Sea drops 963 vertical feet over 2,628 feet of skiing, with a steepest pitch of 24° about 1,250 feet below the top. That's steeper than 21% of the 4,740 black diamond runs we've measured in North America, and the 68th steepest of 140 named runs at Keystone. It faces southwest.
Facing southwest at an average 22°, Two If By Sea gets about 129% of the winter sun that flat ground at Keystone does, December through March. That's sunnier than 92% of the runs we've measured, and the 18th sunniest named run at Keystone. Its top sits at 12,480 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.