Running Races in Greenfield, Massachusetts 2026 | Browse All Races

There are 2 running races in Greenfield, Massachusetts in 2026. The next is the Mutts & Mayhem on May 17. Distances include 5K races, half marathons.

Sun, May 17 · Greenfield, MA Greenfield

OCR Large Dog (40+ lbs)Small Dog (Up to 40 lbs)

From $40 Open

Sun, Aug 2 · Greenfield, MA Greenfield

Triathlon Two Person Sprint TeamSprint TriathlonThree Person Sprint Team +3

From $120 Open

Running Races in Greenfield, Massachusetts — 2026