1–2 Mar 2025 70 days to go! #BostonRunShow Tickets

Clarence DeMar Marathon, Inc

The Clarence DeMar Marathon and DeMar Half Marathon are tremendously well-organized and welcoming races held during early New England foliage season. The 26.2-mile course is USATF-certified and a Boston qualifier. At the DeMar, we give our runners a world-class experience as we celebrate each and every runner who cross of the finish line.