Maine
Maine Triathlon Calendar 2026-2027
Monthly updates for Maine
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in Maine for 2026-2027! Our updated list features 5 exciting races across the region. Find your next race in Maine below and join the running community at these great events!
August 2026
A multi sport event in Lincoln, Maine offering Olympic and Sprint triathlons plus corresponding duathlon options around Prince Thomas Park and Lake Mattanawcook.
Swimrun across Casco Bay islands near Portland, Maine, with three distances, ocean swims, island runs, mandatory safety gear, and ferry transport for athletes.
OTILLO Swimrun Casco Bay Islands is a swimrun event in Long Island, Maine on August 9, 2026, offering World Series, Sprint and Experience categories for solo and team entrants plus spectator boat tickets for adults and children.
A community triathlon at Pemaquid Beach Park offering a 400-yard swim, 17.4-mile bike, and 3.1-mile run, with individual and three-person relay options, chip timing, awards by age group, and proceeds supporting a playground fund.
September 2026
A weekend triathlon and running festival at Spring Hill, South Berwick, ME, featuring sprint and Olympic races, relays, multiple road runs, lake swims, and a post-race brunch.