There are enough triathlons and duathlons out there. How about a true test of your late summer conditioning? After five successful years as one of the most difficult sprint triathlons in the world, The Gut Check was reconfigured in 2019 as a point-to-point adventure race within Cape Cod’s 2000-acre DCR Nickerson State Park. Each year, the course is different — and no one knows exactly what it will be until shortly before the race! The 2025 race filled to capacity in advance of Race Day. Don’t miss out in 2026!

Event details and schedule