Located at 1,650 meters (5,430 ft) at the base of the Rocky Mountains, Boulder is one of the world’s most iconic endurance training destinations for runners, triathletes, and cyclists. The city blends altitude benefits with an unmatched variety of terrain — flat dirt paths along Boulder Creek Path, rolling gravel roads, and technical mountain trails around Chautauqua Park and the Flatirons. Athletes can transition seamlessly between tempo runs, long aerobic miles, hill repeats, and track sessions. With its mix of structured training routes and vibrant lifestyle, Boulder is ideal for both high-performance training camps and active holidays. It’s widely regarded as the endurance sports capital of the United States.