An athlete was killed while competing in Sunday's Ironman Boulder triathlon in Boulder, Colo.

An athlete was killed while competing in Sunday’s Ironman Boulder triathlon in Boulder, Colo. 

Thirty-four-year-old Michelle Walters of McCook, Neb. was struck by a vehicle and she did not survive her injuries. She was struck on U.S. 36 just north of Broadway at 9:54 a.m.

The crash marks the fourth time a cyclist has been killed by a driver in Boulder County since late May.

Ironman Boulder officials released the following statement:

“We are deeply saddened to confirm the death of one of our athletes at Ironman Boulder. We are working with the Colorado State Patrol to gather all of the details regarding the incident that occurred on (U.S.) 36 just north of Broadway. Our condolences go out to the athlete’s family and friends, whom we will continue to support.”

State Patrol officials said alcohol and speed are not believed to be contributing factors in the crash, which remains under investigation. Officials have not yet identified the driver or the vehicle involved in the crash.

Read more at and check back as we continue to report on this developing story.