Niantic Bay Triathlon
East Lyme (Niantic), United States · August · Hartford Marathon Foundation
Course: 0.8 km (0.5 mi) swim, 18.3 km (11.4 mi) bike, 5.1 km (3.2 mi) run. 0.5 mi (800 m) swim, 11.4 mi (18.3 km) bike, 3.2 mi (5.1 km) run. Older listings give a 12 mi (19.3 km) bike.
Why people love it
- Sheltered bay swim of 0.5 mi (800 m) in waves, point to point between beaches
- Sprint only: 11.4 mi (18.3 km) bike and 3.2 mi (5.1 km) run
- Transition is beside the swim start and the oceanfront run finishes on the beach
- Run by the Hartford Marathon Foundation; it sold out in 2025
Watch out for
- A reviewer reported seaweed and some jellyfish in the swim
- Narrow start chute means kicking and contact in the first swim minutes
- No fluids on the 11.4 mi (18.3 km) bike course
- Sand near the finish slows the last few hundred metres (yards)
- Few athletes have written about this race, and the newest account is from 2013.
Race
How racers feel about it, how well it is run, and how it treats a first timer. Counts for 30% of the overall score.
Toughness: Moderate
- Racer satisfactionLoved3.6
Few athletes have written about it: a 2013 reviewer recommends it for beginners and a 2006 winner calls it a favourite. · Low confidence
- OrganizationWell run3.6
Run by the Hartford Marathon Foundation with police and volunteers on the bike course and chip timing. No athlete has written about organisation. · Low confidence
- First timer friendlyFriendly3.9
Half mile (800 m) calm bay swim, 11.4 mi (18.3 km) bike and 3.2 mi (5.1 km) run. One reviewer recommends it for beginners. · Low confidence
Course traits, not part of the score
- PR potentialAverage3.4
Reports conflict on flat versus rolling, and the run finishes on sand. · Low confidence
Swim
Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 16% of the overall score.
- Wetsuit legalUsually4.0
Early-August water likely runs 20 to 24 °C (68 to 75 °F). USA Triathlon allows wetsuits to 25.6 °C (78 °F). · Low confidence
- Water temperatureComfortable3.8
Estimated 20-24 °C (68-75 °F) in early August; reviewer reports seaweed and some jellyfish. · Low confidence
- Calm waterMostly calm4.0
The organiser describes a sheltered bay with little current. No athlete has commented on how rough it gets. · Low confidence
- Swim easeEasy3.9
Half mile (800 m), calm bay, narrow start chute. · Low confidence
- Swim experienceFine3.4
Beach start in a sheltered bay. A 2013 reviewer reports seaweed and jellyfish. · Low confidence
- Swim supportGood3.7
Wave starts, a calm bay and a 35 min swim limit. Support boats are not described and a reviewer reports kicking at the narrow start. · Low confidence
Bike
Road surface, closures, scenery and wind. Counts for 18% of the overall score.
- Road surfaceMixed3.3
Not described in any source; rural New England roads assumed mixed. · Low confidence
- Road closuresPartly closed3.1
Police and volunteers monitor the course, which suggests open roads with traffic control. Local news mentions traffic disruption. · Low confidence
- Bike sceneryBeautiful3.6
Shaded rural East Lyme roads with long straights, as described by the organiser. No athlete comments on scenery. · Low confidence
- WindSome wind3.4
Coastal loop; wind not mentioned by any source. · Low confidence
Course traits, not part of the score
- Bike speedAverage3.4
A 2006 winner noted braking points on the 11.4 mi (18.3 km) loop. No split data. · Low confidence
- Bike flatnessRolling3.3
Likely 100 to 200 m (330 to 650 ft) over 18.3 km (11.4 mi); the organiser says flat, a 2006 winner says hills. · Low confidence
- Bike simplicitySome technical parts3.2
2006 winner mentions frequent braking; routes through village streets. · Low confidence
Run
Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.
- Crowd supportStrong3.5
Oceanfront finish on the beach in a small summer town. No athlete describes the crowds. · Low confidence
- Aid stationsStandard3.2
Three water stations on the 3.2 mi (5.1 km) run. No fluids are offered on the 11.4 mi (18.3 km) bike. · Low confidence
- Run sceneryBeautiful4.0
Run follows the Niantic oceanfront and finishes on the beach, as described by the organiser. No athlete comment. · Low confidence
- Run conditionsEasy3.5
Short oceanfront run with a sand finish. · Low confidence
Course traits, not part of the score
- Run flatnessMostly flat4.0
Oceanfront, estimate under 15 m (50 ft) over 5.1 km (3.2 mi). · Low confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 13% of the overall score.
- Air temperatureWarm or cool3.4
Estimated 20-28 °C (68-82 °F) with coastal humidity on a morning in early August. · Low confidence
- Weather reliabilityReliable3.5
Summer shoreline; no cancellations found in the sources. · Low confidence
- Venue beautyLovely3.9
Hole in the Wall Beach and McCook Point Park on Long Island Sound, with an oceanfront finish. Based on the venue, not athlete accounts. · Low confidence
- Spectator friendlyEasy3.6
Compact beachfront venue with transition beside the swim start; bike loop is not watchable. · Low confidence
Course traits, not part of the score
- Low altitudeSea level5.0
Sea level, about 5 m (16 ft). · High confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 10% of the overall score.
- Hotel availabilityBook early3.2
Shoreline resort area in August; not researched in detail. · Low confidence
- Hotel valueNormal2.9
Summer shoreline pricing is normally high; no race-specific data. · Low confidence
- WalkabilityWalkable4.0
Transition at McCook Point Park beside the swim start and near the beach finish; parking details not published. · Low confidence
- Travel easeOne connection3.3
About 70 km (43 mi) from Hartford Bradley airport; Amtrak and Shore Line East stop in Niantic. · Low confidence
- LogisticsSimple3.9
Single transition at McCook Point, point to point swim near transition, chip return at the finish; no shuttles mentioned. · Low confidence
- Town and foodGood3.8
Small shoreline village with beach and restaurants; not researched in detail. · Low confidence
Key facts
- Location
- East Lyme (Niantic), Connecticut, United States
- Typical month
- August
- Latest or next date
- 9 August 2026
- Organiser
- Hartford Marathon Foundation
- Field size
- About 460 athletes
- Distances (non-standard)
- 0.8 km (0.5 mi) swim, 18.3 km (11.4 mi) bike, 5.1 km (3.2 mi) run
- Cutoffs
- Swim 35 min, Finish 2 h 30 min
- Swim venue
- Niantic Bay (Long Island Sound) from Hole in the Wall Beach at McCook Point Park (bay)
- Water temperature
- 20–24 °C (68–75 °F)
- Wetsuit
- Optional (USA Triathlon rules assumed; organiser page is silent)
- Swim start
- wave start, point-to-point between sandy beaches, rectangular buoy course
- Swim laps
- 1
- Bike laps
- 1
- Run laps
- 1
- Run shade
- Oceanfront, mostly open
- Air temperature
- 20–28 °C (68–82 °F)
- Humidity
- Moderate to high
- Altitude
- 5 m (16 ft)
- Nearest airport
- Hartford Bradley (BDL) or Groton New London (GON, small), 70 km (43 mi) away
- Where to stay
- Niantic, Old Lyme
- Booking
- Shoreline summer weekend: book early. Not researched in detail.
What racers and reviewers say
- BibRave: Niantic Bay Sprint Triathlon reviewRaced 2013 · aggregator · Positive
A reviewer calls it a good sprint for beginners that still challenges experienced athletes. Warns of seaweed and jellyfish in the swim and a narrow start chute with plenty of kicking; advises sprinting at the swim exit. The page is no longer online.
- Rappstar: The Hat Trick (Niantic Bay race report)Raced 2006 · blog · Positive
Three-time overall winner's report from 2006. Swim was a triangle in a wetsuit, the 11.5 mi (18.5 km) bike was fast but full of braking and hills, and the 3.2 mi (5.1 km) run ended on a beach section. Calls the race a sentimental favourite.
“a really great day”
- DVIDS: Coast Guard R&D Center team at the Niantic Bay TriathlonRaced 2016 · article · Positive
A unit team of one individual, a biker and a swimmer raced the 7 Aug 2016 edition: 0.5 mi (800 m) swim, 11.2 mi (18 km) bike, 3.2 mi (5.1 km) run to the beach finish. Describes a community-minded event but gives no course condition detail.
- The Day: Florio wins 19th annual Niantic Bay Triathlonarticle · Positive
Local newspaper recap of the 19th edition, noting 459 competitors and a winning time of 59:54.
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Sources
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