A runner died Sunday after being rushed to a hospital while competing in the Milwaukee Lakefront Half Marathon, with the medical response centered on a stretch of the course along the Hoan Bridge. The Milwaukee County Medical Examiner's Office confirmed it was called in after the runner was pronounced dead at a local hospital. The person's identity has not been released.
According to TMJ4, the runner was taken to the hospital by ambulance from a part of the half marathon course along the Hoan Bridge, and the medical examiner's office confirmed it was called after the runner was pronounced dead. CBS 58 reported that marathon organizers said a runner was transported from the half marathon course to a local hospital Sunday morning, and that station separately reported the Milwaukee Medical Examiner's Office was called to the Milwaukee Lakefront Marathon that day. The two outlets describe the medical examiner's involvement somewhat differently, and it is not clear from available reporting how the discrepancy should be reconciled.
Video captured by WISN 12 News showed first responders loading a person onto a stretcher and into an ambulance near the north end of the Hoan Bridge shortly after 10 a.m. A runner told the station they saw someone receiving medical treatment near the 13-mile mark of the course.
Race Crosses the Hoan Bridge Twice
Per WTMJ, the full and half marathon races began together at 7 a.m. Sunday at the Baird Center and crossed the Hoan Bridge twice during the course. The half marathon's own event page notes it is the only race in the lineup that crosses the iconic span, part of a route limited to 2,500 marathon runners and 3,500 half-marathon runners, according to the Milwaukee Lakefront Marathon. The event is produced by the Badgerland Striders Running Club.
In response to Sunday's death, the Milwaukee Lakefront Marathon said it maintains established medical and emergency-response protocols developed in coordination with its medical and public safety partners, the race told WISN. TMJ4 reported the organizers described their safety protocols as including on-course medical support, communications procedures and coordinated response planning. WTMJ characterized the story as developing and said it would be updated as more details become available.
A Second Endurance-Race Death in Wisconsin This Fall
The Milwaukee death comes less than a month after a triathlete died during the IRONMAN 70.3 race in Madison. According to jsonline.com, that athlete died after being pulled from Lake Monona on Sept. 12, and was at least the third person to die since 2019 while or after participating in that event. The Madison Fire Department spokesperson said the athlete was a 51-year-old man from Colorado, while wmtv15news.com reported that he was taken to a hospital, where he died. WMTV reported that UW Lake Rescue brought him to shore before an ambulance took him to a hospital, where he died.
What Research Says About Cardiac Risk in Long Races
Sudden cardiac arrest remains rare in long-distance running events but carries a high fatality rate when it occurs. A study published in the New England Journal of Medicine examining marathon and half-marathon races from January 2000 through May 2010 found 59 cardiac arrests among 10.9 million runners, an incidence rate of 0.54 per 100,000 participants, and 42 of those 59 cases, or 71%, were fatal. The same research found the incidence of cardiac arrest was significantly higher during marathons, at 1.01 per 100,000, than during half-marathons, at 0.27.
A more recent review highlighted by the American College of Cardiology looked at 29 million U.S. marathon and half-marathon runners from 2010 to 2023 and identified 176 sudden cardiac arrests and 59 deaths, a 34% fatality rate among cases. That 2025 analysis found incidence rates comparable to the 2000-2009 period even as the risk of dying decreased over time, crediting a rise in bystander CPR from 58% to 100% of cases and near-universal use of automated external defibrillators on scene. Most cardiac arrests, the review found, occurred during the final quarter of races.
No cause of death has been released for the runner who died Sunday in Milwaukee, and the person's identity remains unknown as the medical examiner's office continues its involvement in the case.
