Loading view. Running Races in Duxbury, MA Find runs and races near you with our Duxbury, MA running calendar. Find your next 5K, 10K, half marathon, road race, trail run, marathon, ultra, and everything in between. Today 9/18/2021 Sat, September 18, 2021 - 5/3/2024 Now Select date. September 2021 Duxbury Beach Triathlon In-Person RaceSat, September 18, 2021 Duxbury, MA Sprint Triathlon April 2023 Duxbury Half Marathon In-Person RaceSat, April 1, 2023 Duxbury, MA Half Marathon June 2023 Duxbury Fitness 5K In-Person RaceSun, June 4, 2023 Duxbury, MA 5K Previous Events Today Next Events