The Great River Challenge, Off-road Triathlon
Northfield, Massachusetts10:00 AM startOpen water swim
from $55
RegisterMassachusetts half iron triathlons
Half Iron Triathlons in Massachusetts
1 upcoming half iron triathlons in Massachusetts listed by date, with cities, start times, and entry fees. Find a half iron triathlon near you and register.
1
upcoming races
0
cities with 3+
Other distances
October 2026