Four 12,000-foot passes, classic alpine views and a rugged loop around Colorado's most-photographed peaks make this 26.5-mile backpack a Rocky Mountain epic.

Rocky scrambles and a knife-edge ridge lead up one of the most challenging Fourteeners. Stellar views over the untamed Elk Range are endless.

Solitude rules on this remote trek through wildflower meadows to a skyscraping post above the rugged backcountry of the San Juan Mountains.

This stiff but non-technical ascent leads to the highest point in Rocky Mountain National Park with unrivaled postcard views.

This 15.2-mile route runs over gemstone deposits of quartz and aquamarine to a rocky summit in the southern Sawatch Range.

String together three Sawatch summits on this popular circuit with long alpine traverses overlooking the Continental Divide.

Tour three 14,000-foot peaks (and one unranked 14er) on this loop in the Mosquito Range.

Traverse slippery shale and narrow sandstone ledges up this exposed pinnacle. Helmets recommended and a stomach for gut-clenching scrambles is mandatory.

Bag a rugged fourteener on this 20.8-mile lasso loop linking shady evergreens and long sunny scrambles to a beautiful peak high above the Maroon Bells-Snowmass Wilderness.

Hike into the core of Indian Peaks Wilderness on this 13.6-mile overnight, which leads past waterfalls to a sunbleached valley and a sweet lakeside campsite.