The Boston Triathlon is an urban multisport event in Boston offering Sprint and Olympic distance triathlons with a Dorchester Bay swim, closed-road bike segments along the South Boston shoreline, and a harbor-view run. It supports individuals, 2- and 3-person relay teams, and a Team Challenge, with a fundraising option benefiting Boston Medical Center. The event also includes family and spectator elements such as Kids Day, wetsuit and bike rentals, race hotels, photos, and results.
AI named Boston Triathlon from January 2026 to September 2026.
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