Wet Mountain Valley — Bishop Castle, the Rainbow Trail & Dark Skies Beneath the Sangre de Cristos
About two hours southwest of Colorado Springs the plains give way to the Wet Mountain Valley, a high, quiet ranching basin in Custer County pinned between two ranges — the rolling, forested Wet Mountains to the east and the abrupt, glacier-carved wall of the Sangre de Cristo Range to the west, where a dozen peaks top 14,000 feet in an unbroken line. Day one climbs into the San Isabel National Forest for the most improbable landmark in Colorado, Bishop Castle, a 160-foot hand-built stone fortress raised single-handedly over more than half a century, then walks the cool spruce-fir forest of the Wet Mountains before dropping into the twin frontier towns of Westcliffe and Silver Cliff for dinner and the night. Day two is spent at the foot of the Sangre de Cristos on the Rainbow Trail, the hundred-mile path that traces the entire base of the range, with side roads climbing toward Hermit Pass and Music Pass for crest-line views straight up into the wilderness. Westcliffe and Silver Cliff together form one of the world's few certified International Dark Sky Communities, so the day closes with genuinely dark, star-choked skies before the drive back over the Wet Mountains to Colorado Springs.