The Cocodona 250 ultramarathon was overshadowed by tragedy after organisers announced that one of the participants had passed away following a “serious medical emergency”.
The race follows a 253-mile point-to-point route through central Arizona, linking historic towns and trails off the beaten path.
It was established in 2021 and has quickly become one of the highest-profile events over the 200+ mile distance, with a sold-out field of 404 runners in 2026.
Statement in full
It started on Monday 4 May in Black Canyon City and the runners have 125 hours to reach the finish in Flagstaff.
Sadly late on Tuesday night, organisers posted the following announcement on their Instagram page: “We are deeply saddened to share that a participant experienced a serious medical emergency today during the event and has passed away. The runner’s family and crew have been notified.
“Out of respect for the runner’s family and loved ones, we are not sharing additional personal details at this time. Our team is supporting those directly involved and will share more only when appropriate.
“Please keep the runner’s family, friends, fellow runners, volunteers, and first responders in your thoughts. We are deeply grateful to this beautiful community.”
Race will continue
The statement added: “The race is going to continue in their honor.
“We ask all participants and crew to carry the memory of this runner with you on the trail.”
