Posted in NY Post Runner has fatal medical emergency during grueling 250-mile Cocodona ultramarathon in Arizona May 7, 2026 The Cocodona is one of the toughest ultramarathons in the US, featuring a course that rises more than a mile in elevation — twice — across Arizona. https://nypost.com/2026/05/06/sports/runner-has-fatal-medical-emergency-during-cocodona-250-ultramarathon/