Triathlons in Massachusetts

Massachusetts has 25 upcoming triathlons scheduled for 2026. Two months carry most of the calendar: September (11) and August (8) together account for 76% of races (19 of 25). No single city dominates the calendar. Littleton leads with 2 races, followed by Nantucket (2), Mattapoisett (2), and Greenfield (2). The remaining 68% of the calendar is spread across smaller cities.

Triathlons by month in Massachusetts

Sep (11) · Aug (8) · Jul (5) · Oct (1)

Showing 24 of 25

Triathlon

Appleman Triathlon/Aquabike

Littleton, MA

Triathlon

Appleman Triathlon/Aquabike

July 18, 2026

Littleton, MA

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Nantucket Triathlon

July 18, 2026

Nantucket, MA

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2026 Nantucket Triathlon

Nantucket, MA

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2026 Nantucket Triathlon

July 19, 2026

Nantucket, MA

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APPLEMAN TRIATHLON/DUATHLON/AQUABIKE CHARITY RACE

July 19, 2026

Littleton, MA

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Triathlon

Mattapoisett Lions Triathlon

July 26, 2026

Mattapoisett, MA

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Mattapoisett Lions Triathlon

Mattapoisett, MA

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Mattapoisett Lions Triathlon

August 1, 2026

Mattapoisett, MA

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Cohasset Kids Triathlon

August 1, 2026

Cohasset, MA

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42nd Annual Greenfield Triathlon

August 2, 2026

Greenfield, MA

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2026 Gloucester Sprint Triathlon

Gloucester, MA

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2026 Gloucester Sprint Triathlon

August 2, 2026

Gloucester, MA

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Greenfield Triathlon

Greenfield, MA

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Greenfield Triathlon

August 9, 2026

Greenfield, MA

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The Sharon Triathlon

August 9, 2026

Sharon, MA

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2026 Boston Triathlon

Boston, MA

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2026 Boston Triathlon

August 23, 2026

Boston, MA

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4th Annual Kingsbury Club Summer Youth Triathlon

August 23, 2026

Medfield, MA

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Kingsbury Club Youth Triathlon

Medfield, MA

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Kingsbury Club Youth Triathlon

September 5, 2026

Medfield, MA

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2026 Hyannis 2 Triathlon

Craigville, MA

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2026 Hyannis 2 Triathlon

September 12, 2026

Craigville, MA

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Call To Honor Triathlon

Boxford, MA

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Call To Honor Triathlon

September 12, 2026

Boxford, MA

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Hyannis 2 Triathlon

September 12, 2026

Centerville, MA

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Title 9 Women's Triathlon

September 13, 2026

Hopkinton, MA

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Hopkinton Women's Triathlon

Hopkinton, MA

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Hopkinton Women's Triathlon

September 13, 2026

Hopkinton, MA

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Hyannis 2 Triathlon

Centerville, MA

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Hyannis 2 Triathlon

September 13, 2026

Centerville, MA

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Dover Sherborn Boosters Triathlon

September 13, 2026

Dover-Sherborn, MA

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Josh Billings Triathlon

Lenox, MA

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Josh Billings Triathlon

September 19, 2026

Lenox, MA

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Buzzard's Bay Sprint Triathlon & Du

September 20, 2026

Westport, MA

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Buzzards Bay Triathlon

Westport, MA

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Buzzards Bay Triathlon

September 20, 2026

Westport, MA

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Triathlons in Nearby States

Connecticut New Hampshire New York Rhode Island Vermont

Frequently asked questions

What are the standard triathlon distances?▾

The main distances are Sprint (750m swim, 20K bike, 5K run), Olympic (1.5K swim, 40K bike, 10K run), Half-Ironman/70.3 (1.2mi swim, 56mi bike, 13.1mi run), and full Ironman (2.4mi swim, 112mi bike, 26.2mi run). Browse all distances on RACE.

What do I need for my first triathlon?▾

At minimum you need a swimsuit, goggles, a road or tri bike, helmet, running shoes, and a race belt for your number. Many beginners start with a sprint triathlon, which can be completed in 1-2 hours.

What is the difference between sprint and Olympic triathlon?▾

A sprint triathlon is roughly half the distance of an Olympic triathlon. Sprints typically take 1-1.5 hours while Olympic distance races take 2-3.5 hours. Sprints are ideal for beginners.

How do I qualify for the IRONMAN World Championship?▾

Athletes qualify by earning a slot at an IRONMAN-branded qualifying race. Each full IRONMAN event allocates slots to age group winners. The World Championship is held annually in Kailua-Kona, Hawaii.

What are the biggest triathlons in the US?▾

The SuperTri Chicago Triathlon is the largest single triathlon event with 8,000+ athletes. IRONMAN events in Texas, Florida, Lake Placid, and Arizona draw thousands. Escape From Alcatraz is a bucket-list race. Find them all on RACE.

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