GutCheck Cape Cod

GutCheck Cape Cod takes place in Brewster, Massachusetts, on September 19, 2026. This is an adventure race starting at 9:00 a.m., with a course combining three legs listed as 3 miles, 5 miles and 2 miles (4.8 km + 8 km + 3.2 km). The organizer's website, gutchecktriathlon.com, points to a multisport format rather than a pure running event, so check the race details for the discipline of each leg.

Multisport events like this one suit athletes who enjoy variety and transitions: the individual legs are short, but switching disciplines is where time is won or lost. If you are a runner looking to try something different, focus your 8- to 10-week build on brick workouts, meaning two disciplines back to back, and on practicing transitions with your gear laid out in order. Cape Cod in late September is generally pleasant, but the water and wind can be cool, so plan your layers accordingly.