Join RaceWire and Stack Endurance for the 9th annual Beach and Back Half Marathon & 5K on May 17, 2025 right off Brant Rock in beautiful Marshfield, MA!

Join RaceWire and Stack Endurance for the 9th annual Beach and Back Half Marathon & 5K on May 17, 2025 right off Brant Rock in beautiful Marshfield, MA!

Sign up for Beach and Back Half Marathon & 5K on Sat 17th May 2025. Learn how to enter, read reviews, get exclusive discounts, see photos, course maps, ...

Experience the breathtaking views of the scenic coastline during the annual Beach and Back Half Marathon & 5K event in Marshfield, MA.

The Beach and Back Half Marathon & 5K is on Saturday May 17, 2025. It includes the following events: Half Marathon and 5K.

Join RaceWire and Stack Endurance for the annual Beach and Back Half Marathon & 5K this May right off Brant Rock in beautiful Marshfield, MA!

Join RaceWire and Stack Endurance for the 9th annual Beach and Back Half Marathon & 5K on May 17, 2025 right off Brant Rock in beautiful Marshfield, MA!

The 1/2 marathon will head into Marshfield Hills, skirt the edge of North Marshfield then return to Humarock. Advertisement. Free Plan for Beginner Runners.

The 9th annual Beach and Back Half Marathon & 5K will take place on May 17, 2025, in Marshfield, Massachusetts, right off Brant Rock.