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 10 exciting races across the region. Find your next race in Maine below and join the running community at these great events!
June 2026
A multi-event race day at St. Joseph's College on June 28, 2026, featuring Sprint and Olympic triathlon courses, duathlon, aquabike, relays, and virtual options. Swim in Sebago Lake, bike on country roads, and run on campus trails.
July 2026
Triathlon Pohénégamook marks its 11th edition on July 4 and 5 2026 with a conference, an open water swim clinic and a program of adult, youth, team and running events.
A self supported 24 hour adventure race in Greenwood, Maine where teams of one to four navigate an unmarked linear course by mountain bike, foot and boat using map and compass. Registration opens Jan 4 2026.
Experience a USAT sanctioned sprint triathlon at Lake Pennesseewassee Park. This event features a 750 meter swim, a 20 km bike ride, and a 5 km run for individuals and relay teams.
An adventure-style triathlon combining a 1.2 mile swim, a 95 mile bike, and a final run up to Mount Washington summit, with athlete support allowed and strict prior-qualification requirements.
IRONMAN 70.3 Maine on July 26, 2026 in Augusta, ME features a fast downriver Kennebec swim, a 56 mile bike and a rolling 13.1 mile run finishing by the State Capitol with strong local spectator support.
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.
A swimrun across the islands of Casco Bay near Portland, Maine, with ocean swims, island runs, and three race distances. Athletes travel to start lines by ferry and must carry mandatory swimrun gear.
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 sprint triathlon at Pemaquid Beach Park in Bristol Maine featuring a 400 yard swim, 17.4 mile bike and 3.1 mile run. The event supports Bristol Parks and Recreation and allows relay teams of up to three people.