A participant in the Cocodona 250 ultramarathon in Arizona dies after a medical emergency during the race, organizers say. The ultramarathon, covering about 253 miles and running from Monday through Saturday, includes substantial climbing, with more than 38,000 feet of elevation gain along the route. Organizers said in a statement posted on Instagram that the runner experienced a “serious medical emergency” during the event.

Following the death, race organizers state that the Cocodona 250 will continue in the runner’s honor. The Independent and The Guardian both report that the event proceeds despite the incident. The New York Post similarly describes the race as one of the toughest ultramarathons in the United States, noting the extensive elevation changes along the course.

The reports provide limited details about the runner’s identity, the specific nature of the medical emergency, or the circumstances at the time it occurred.