Quandary Peak is a fourteener in the US state of Colorado, the highest peak in the Tenmile Range (a northern extension of the Mosquito Range). It is the 12th, 13th, or 14th highest peak in Colorado, depending on how it is ranked. (It has nearly the same elevation as Castle Peak and Mount Evans.) It lies in Summit County and in the Arapaho National Forest, about 6 mi (10 km) south-southwest of the town of Breckenridge.
The standard route up Quandary Peak is a trail hike (class 1), starting from a trailhead about 1 mi (1.6 km) north of Hoosier Pass on the east side of the peak. Hence it is a popular fourteener to climb, because of the relatively easy ascent, as well as its proximity to Denver and Breckenridge. Quandary Peak is also popular with backcountry skiers and snowboarders. The gentle ascent makes for an easy climb from the east, with less danger from avalanche than on many other fourteeners, and the other slopes of the peak are steep and appeal to expert backountry skiers.
One such steep ski mountaineering route is the Cristo Couloir.