A playground for nature lovers and outdoor enthusiasts, Colorado has majestic landscapes, raging rivers, and winding trails perfect for activities from biking to rafting. The heart of the Rocky Mountains has scores of snow-capped summits towering higher than 14,000 feet and trails from easy to challenging for exploring them—as well as roads offering spectacular drives. Skiers flock to the slopes here for the champagne powder and thrilling downhill runs. Need a break from the outdoors? Urban adventures await in cool cities like Denver, Boulder, and Aspen.