Ironman Boulder

Boulder provided a picturesque backdrop for athletes from around the world Sunday at the 2017 Ironman Boulder triathlon.

To improve on her third-place finish from a year ago, Jackson aims to satisfy her Kona qualification standard with a finish at Ironman Boulder Sunday.

This weekend O'Donnell is literally from home, aiming to earn his Kona start this fall.

Ironman Boulder has earned the highest level certification, Evergreen, from the Council for Responsible Sport.

A look inside the city’s most notorious cycling route.

Mitchell Byars writes about the reaction of local authorities and athletes after an athlete was killed during Sunday's Ironman Boulder triathlon.

Justin Daerr chats about his rise to the top of the podium and shares run training advice–including an endurance-focused fartlek session.

Images of a beautiful (and hot!) day at the inaugural running of Ironman Boulder.

Local athletes ruled the day as Colorado residents swept the podium in both the men’s and women’s races.

Hundreds of hard bodies took to the Boulder streets in droves on Thursday night, strutting their stuff at the first annual Boulder Underpants Run.

Boulder resident Richie Cunningham shares his tips for each leg of the race; out-of-towners, take note!

The inaugural 2014 Ironman Boulder is set for this Sunday, Aug. 3.

Messick also explains the unique challenge of growing a race series while trying to keep up with an insatiable demand for a Kona slot.

Registration for Ironman Boulder opens July 17.

Local government in Boulder, Colo. has given approval for World Triathlon Corporation to work toward hosting an Ironman in the city starting in 2014.