IRONMAN Boulder

Nestled at the foot of the imposing Flatirons, Boulder, Colorado is already a wildly popular home-base and vacation destination for world-class triathletes. The city's health-conscious culture, near-perfect weather and breathtaking natural environment means it's destined to be an instant favorite on the IRONMAN circuit.

Boulder's robust downtown, with its famous pedestrian-only Pearl Street Mall and idyllic Boulder Creek, will provide families and fans an unforgettable race day as they wait for their loved ones to cross the finish line. From five-star hotels to James Beard award-winning restaurants, Boulder's hotel and dining options are some of the best in the nation.

The race will start at the Boulder Reservoir with a single loop 2.4-mile swim. Once finished in the water, the first transition will start the athletes on a beautiful 112-mile two-loop bike course in the region's vast open space.

The two-loop run course is almost entirely on Boulder Creek Trail, winding along the creek and through city parks. Spectators will have multiple opportunities to cheer on the athletes and the last few steps of the day will take athletes up to Pearl Street for a triumphant finish.