Register for the 2021 Great Bay Half Marathon and 5K

The 14th Annual Great Bay Half Marathon & 5k is returning to Newmarket, NH on Sunday, April 11, 2021 for another day of scenic New England running by the Great Bay estuary! Join thousands of runners and spectators at New Hampshire’s best spring road race!


Price will increase in 4 weeks.
Show full pricing schedule to see a detailed list of price increases.