Trehko tracks 13 endurance events in Hawaii, including 11 Running events, 2 Triathlon events. Whether you're searching for your first 5K, a Boston qualifier marathon, a local triathlon, or a trail ultra, Hawaii has a race for every athlete. Use Trehko to compare registration fees and deadlines side by side, save your target races, and get automated reminders before registration opens or closes. All races listed below link directly to their official registration pages.