Savvy mountaineers know that it's not just about the Fourteener checklist; many of the Thirteeners in Colorado are harder and far more interesting. Pacific Peak in Arapaho National Forest falls into that category, and has the bonus of Pacific Tarn, the highest lake in the country, which sits at 13,420 feet on the way to the summit at 13,950 (which, by the way, makes it one of Colorado's so-called Centennial Thirteeners, the state's hundred highest). Located not far from Quandary, Pacific takes hikers past two abandoned mines and several lakes tucked into glorious high-alpine meadows, and also offers ice climbers two challenging couloirs. The four ridges at the top — choose your route carefully, because each ridge approach varies from moderate to expert in skill level, and all of them require some route-finding — are exposed and rocky, but slow-and-steady to the talus field results in a straight shot at Quandary, the Tarn and the whole Tenmile Range.
Readers' Choice: Dallas Peak