Sprint Triathlon Aquabike

Cohasset Triathlon 2027

Date: Sunday, June 27, 2027
Start time: 7:45 AM start (New York)
Location: Cohasset, Massachusetts
Entry fee: From $125
Included with entry: Includes a shirt
Fundraising: Takes optional donations when you register

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Official race website

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Events and entry fees

Event	Distance	When	Entry fee	Cap
Individual - AquaBike	AquabikeSwim 0.25 mi · Bike 12.1 miOpen water swim	Jun 27, 20277:45 AM	$125	2
Individual - Triathlon	Sprint TriathlonSwim 0.25 mi · Bike 12.1 mi · Run 3.1 miOpen water swim	Jun 27, 20277:45 AM	$125	1,302
Relay Team (2 or 3 person)	Sprint TriathlonSwim 0.25 mi · Bike 12.1 mi · Run 3.1 miRelay or teamOpen water swim	Jun 27, 20277:45 AM	$225	118

Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.

The swim at Cohasset Triathlon

This is an open water swim at Sandy Beach. The organizer's wetsuit note: wetsuits mandatory.

From the organizer's own race information (source). Venues and rules can change from year to year; the race's current athlete guide decides.

Race day planning

Entry fee schedule

Individual - AquaBike and Individual - Triathlon: $125 until Jun 24.
Relay Team (2 or 3 person): $225 until Jun 24.

Online registration closes Jun 24, 2027, unless the race fills first.

Light and altitude

Sunrise on race morning is at about 5:08 AM, and the Individual - AquaBike starts at 7:45 AM. The start sits about 120 feet above sea level.

Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.

Start location and course

345 Atlantic Avenue, Cohasset, MA 02025

Directions to the start

The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.

Where Cohasset Triathlon ranks

No. 2 of 50 on Largest triathlons in the US
No. 2 of 50 on Largest sprint triathlons in the US

National lists computed from results, entry fees, course maps and water temperatures; they refresh through the day.

2025 results

All results

Individual

936

finishers

1:28:21

median

58:28

winning time

34% / 66%

women / men

Finish times, fastest to slowest. Each bar is a slice of the field; the dashed line is the median.

Relay Team 3 Person

finishers

1:23:52

median

59:35

winning time

–

women / men

Aggregated from official results (All Sports Events) for Cohasset Triathlon. Individual finisher names are not stored here.

How fast do you need to be at Cohasset Triathlon?

At the 2025 Individual, the fastest tenth finished in 1:12:49 or better, the top quarter in 1:19:29, and half the field in 1:28:21; the last tenth came in after 1:48:02.

At the 2025 Relay Team 3 Person, the fastest tenth finished in 1:06:39 or better, the top quarter in 1:17:13, and half the field in 1:23:52; the last tenth came in after 1:41:17.

Third place by age group, 2025 Individual
Age	Women	Men
Under 20	1:15:11	1:09:12
20-29	1:13:52	1:00:06
30-39	1:12:34	1:06:36
40-49	1:13:36	1:04:06
50-59	1:16:11	1:06:49
60-69	1:23:31	1:08:45
70+	n/a	1:28:21

Groups with fewer than five finishers are left out. Awards vary by race; check the race's rules.

What would my time get me?

Where a finish time would have placed in 2025.

EventFinish timeGenderAge group

How fast is it?

Faster than most US sprint triathlons

The fastest quarter of the 2025 sprint triathlon field finished under 1:19:29, against 1:24:09 in a typical US sprint triathlon, so times here run 6 percent faster.

Compares the fastest quarter of each field, so walkers and first-timers do not skew it. It reflects the course and the field together: a flat course, cool weather, or a competitive crowd all make times faster.

Typical race-day weather

Around June 27 the day usually runs from 64°F at dawn to 79°F in the afternoon, with measurable rain on about 31% of days. Cold snaps dip to 58°F and hot years reach 89°F.

Based on 75 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.

Race details

Where: 345 Atlantic Avenue, Cohasset, MA 02025Map
Course: Road
Start elevation: About 120 feet
Included with entry: Cohasset Tri 2027 T-Shirt
Donations: Accepted when you register
Distances: Sprint Triathlon, Aquabike
Editions: 2027 (Jun 27, 2027), 2026 (Jun 28, 2026), 2025 (Jun 22, 2025), 2024 (Jun 23, 2024), 2023 (Jun 25, 2023)

Organize this race? Add details or a correction

Quick answers

When is Cohasset Triathlon?: Sunday, June 27, 2027, starting at 7:45 AM.
How much does it cost?: Entry starts at $125 before processing fees.
When does registration close?: Online registration closes Jun 24, 2027, unless the race fills first.
Do athletes get a shirt or medal?: Entry includes a shirt, according to the race's registration page. Check it for sizes and whether kids' races get the same.
Can I donate to a cause when I register?: Yes. The registration form offers an optional donation, usually for the charity or nonprofit the race supports. The race's own page names the cause.
What distances are offered?: Sprint Triathlon, Aquabike.
How big is it, and how fast?: In 2025, 936 athletes finished the Individual; the median finish was 1:28:21 and the winner finished in 58:28.
Is it a fast course?: The fastest quarter of the 2025 sprint triathlon field finished under 1:19:29, against 1:24:09 in a typical US sprint triathlon, so times here run 6 percent faster.
Where does it start?: 345 Atlantic Avenue, Cohasset, MA 02025.