IRONMAN Cozumel
San Miguel de Cozumel, Mexico · November · IRONMAN
Why people love it
- Fast flat course: 180 km (112 mi) over three oceanside loops, with frequent current-assisted swims
- Clear Caribbean swim over reef
- Warm 26-28 °C (79-82 °F) water
- Great local crowd energy in town
Watch out for
- Heat and humidity (22-30 °C (72–86 °F) / 72-86 °F, about 83% humidity) make the run slow
- Wind on the east side of the island
- Drafting enforcement criticised by some
- Late-hurricane-season weather and aid shortfalls in 2021
Race
How racers feel about it, how well it is run, and how it treats a first timer. Counts for 27% of the overall score.
- Racer satisfactionLoved3.9
RaceRaves gives 4/5 and Slowtwitch posters praise the swim, aid and local crowds. Drafting complaints, heat and the three-lap run hold it back. · Medium confidence
- OrganizationWell run3.7
Aid every 16 km (10 mi) and volunteers praised in 2016. In 2021 aid ran out of water and T2 moved. Drafting enforcement is criticised. · Medium confidence
- First timer friendlyDoable3.4
Flat, warm and clear, but a 26-28 °C (79-82 °F) ocean, a crowded self-seeded swim with variable current, heat and a three-lap run. · Medium confidence
Course traits, not part of the score
- PR potentialFast4.4
Flat, with a current-assisted swim and fast bike conditions. Course record 7:44:01 (2019). The hot run, 3-4 min harder than Kona, holds it back. · High confidence
- Course easeTough2.9
Flat and fast on paper, but 22-30 °C (72-86 °F) air at about 83% humidity, east-coast wind and a shadeless three-lap run. · Medium confidence
Swim
Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 15% of the overall score.
- Wetsuit legalRarely1.0
Water is typically 26-28 °C (79-82 °F), well above the 24.5 °C (76.1 °F) limit. Wetsuits are effectively never legal. · High confidence
- Water temperatureUncomfortable1.7
26-28 °C (79-82 °F) is warm, swim-skin territory. · Medium confidence
- Calm waterMostly calm3.5
A sheltered lee side, but current strength and direction vary yearly, and 2012 was choppy. · Medium confidence
- Swim easeEasy3.9
Easy sighting in clear water and often a helpful current. The self-seeded start is still crowded, and the 2024 current was weak. · Medium confidence
- Swim experienceSuperb4.7
Clear Caribbean water over reef with marine life. RaceRaves and Slowtwitch both call it a standout. The rolling start is good but gets feisty. · High confidence
Bike
Road surface, closures, scenery and wind. Counts for 19% of the overall score.
- Road surfaceGood3.6
No direct road-surface complaints. Oceanside and hotel-zone resort-island pavement. · Low confidence
- Road closuresPartly closed3.3
Marshalled, but little drafting enforcement, and a leading pro hit a spectator near 175 km (109 mi) in 2024. · Low confidence
- Bike sceneryBeautiful4.1
Oceanside road on the island's wild east coast plus the hotel zone. RaceRaves scenery 4/5. · Medium confidence
- WindWindy2.4
East-side wind was called 'horrendous' by one racer and was costly in 2012. Milder in 2021. · Medium confidence
Course traits, not part of the score
- Bike speedVery fast4.6
A near-flat three-lap 180 km (112 mi) course. TriRating rated 2021 as the best bike conditions there, and 2025 was 14 minutes faster than average. · High confidence
- Bike flatnessPancake flat4.9
Described as 'tabletop flat'. Exact gain is not published but is well under 600 m (2,000 ft). · High confidence
- Bike simplicityMostly simple4.2
Flat, simple oceanside loops with some town turns. Limited direct evidence. · Low confidence
Run
Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.
- Crowd supportStrong3.9
Locals cheer through town and hotel-zone sections. Quieter on the airport side and the east coast. · Medium confidence
- Aid stationsStandard3.4
Good in 2016 (aid every 16 km (9.9 mi) / 10 mi on the bike). In 2021 stations ran dry on lap three with few toilets. · Medium confidence
- Run sceneryPleasant3.4
Waterfront, plaza and downtown loops. The airport-side section is less pleasant. · Medium confidence
- Run conditionsHard1.9
TriRating 2025: a hot, humid, slow run, 3-4 min harder than Kona. About 83% humidity at 22-30 °C (72-86 °F), little shade, three loops. · High confidence
Course traits, not part of the score
- Run flatnessFlat4.9
Flat waterfront and downtown loops. · High confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 15% of the overall score.
- Air temperatureHarsh2.2
Race-day air is typically 22-30 °C (72-86 °F) at about 83% humidity. · Medium confidence
- Weather reliabilityVariable2.7
The race falls at the tail of hurricane season: chop and heat in 2012, storms and heavy rain in 2021, other years benign. · Medium confidence
- Venue beautyLovely4.4
A Caribbean island with reefs and white-sand beaches. · Medium confidence
- Spectator friendlyEasy3.8
The three-lap run through town and plaza is easy to watch. The island bike is spread out, so viewing is mostly in town. · Low confidence
Course traits, not part of the score
- Low altitudeSea level5.0
Island at 3 m (10 ft). · High confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 11% of the overall score.
- Hotel availabilityGood4.0
A resort island with many hotels and rentals. No sell-out evidence. · Low confidence
- Hotel valueNormal3.3
No price data found. An Airbnb option was praised in 2021. · Low confidence
- WalkabilitySome driving3.2
Downtown hotels walk to Ironman Village, but the swim start is south of town and needs a shuttle. · Low confidence
- Travel easeOne connection3.3
Cozumel International (CZM) has direct US flights. Otherwise take the ferry from Playa del Carmen after landing in Cancun. Bikes need transport. · Medium confidence
- LogisticsSome complexity2.9
A separate swim start and T1 need transport, T2 moved in 2021, and many take a ferry crossing. · Low confidence
- Town and foodGood4.0
San Miguel's waterfront and plaza have plentiful restaurants. · Medium confidence
Key facts
- Location
- San Miguel de Cozumel, Quintana Roo, Mexico
- Typical month
- November
- Latest or next date
- 22 November 2026
- Organiser
- IRONMAN
- Field size
- About 1,630 athletes
- First held
- 2009
- Distances
- 3.8 km (2.4 mi) swim, 180 km (112 mi) bike, 42.2 km (26.2 mi) run
- Swim venue
- Caribbean Sea off west coast of Cozumel (ocean)
- Water temperature
- 26–28 °C (79–82 °F)
- Wetsuit
- Banned
- Swim start
- rolling
- Bike laps
- 3
- Run laps
- 3
- Run shade
- Limited; hot and humid
- Air temperature
- 22–30 °C (72–86 °F)
- Humidity
- About 83% in November
- Altitude
- 3 m (10 ft)
- Nearest airport
- Cozumel International (CZM)
- Where to stay
- Downtown San Miguel, Hotel zone
- Booking
- Hotels and rentals in town and hotel zone; ferry from Playa del Carmen.
What racers and reviewers say
- RaceRaves: triforfun (first-timer)Raced 2022 · aggregator · Positive
First-timer found the course about as flat as it gets with heat and humidity the main challenge. Loved the clear fast swim (though suspected short), scenic oceanside bike loops and energetic crowds; thought the run's loop count wore on them and the expo, medal were weak.
- Slowtwitch forum: 2021 Ironman Cozumel (Djschap7)Raced 2021 · forum · Mixed
Experienced racer's fastest swim of 12 full Ironmans thanks to tidal current; bike winds milder than feared in damp, cool weather. Run suffered from storm-drain smells and aid stations running out of water on the last lap; T2 had been moved. Liked his Airbnb about 1.3 km (0.8 mi) from the Ironman Village.
- Slowtwitch forum: Cozumel 2017 date? (2016 race impressions)Raced 2016 · forum · Mixed
Racers disagree: one praises volunteers, aid every ~16 km (10 mi) and warm local cheering but notes shifting current, feisty self-seeded swim and little drafting enforcement; another calls east-side wind horrendous and says lax officiating means he will not return. Also notes falling participation (about 2,300 peak to roughly 1,500).
- TriRating: Ironman Cozumel 2019 results analysisRaced 2019 · aggregator · Positive
Analysis attributes extremely fast swim times to ocean currents, not a short course (+12:22 adjustment), with a fast bike (+18:33). Course records fell: 7:44:01 men, 8:38:41 women.
- TriRating: Ironman Cozumel 2012 results analysisRaced 2012 · aggregator · Negative
A hard 2012 day: choppy swim, windy bike and hot run produced the slowest race adjustment ever recorded in Cozumel (4:13) with many strong athletes dropping out.
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- TriRating: Ironman Cozumel 2021 results analysisRaced 2021 · aggregator · Positive
Very fast swim (+13:18, helped by incoming tide) and the best bike conditions ever recorded there (+25:12), while heat and humidity made the run slow, similar to Kona. Course records fell for both winners.
- TriRating: Ironman Cozumel 2025 results analysisRaced 2025 · aggregator · Mixed
Calls 2025 typical: swim often current-aided, bike quick (+14 min) but slower than recent years, run hot, humid and slow (3-4 min harder than Kona; no men under 2:45).
- Slowtwitch: Things we noticed from Ironman Cozumel (2024)Raced 2024 · article · Mixed
Pro-race roundup: swim current only mildly positive in 2024 (top pros around 45 min), a drafting penalty for a leading pro, and an official statement on a pro-rider crash with a young spectator after about 175 km (109 mi).
- Slowtwitch: Van Lierde, Vesterby win Ironman Cozumel (2016)Raced 2016 · article · Mixed
Pro race report: fast 43-minute front-pack swim and hot Cozumel pavement on the run causing late fades; winning times of 8:03 and 9:08.
- Slowtwitch: Kienle, Roberts capture Ironman Cozumel (2017)Raced 2017 · article · Positive
Describes an unusually fast swim and a 'tabletop flat' bike; winners went 7:48:11 and 8:54:00.
- Slowtwitch: Rana, Ellis take Ironman Cozumel (2012)Raced 2012 · article · Mixed
Tough 2012 day: women's pros needed well over an hour to swim, winner Ivan Rana ran 2:44:05 for 8:15:07 and Mary Beth Ellis cramped in T1 yet won in 9:15:38.
- TriRating: Ironman Cozumel 2024 resultsRaced 2024 · aggregator · Mixed
Results listing: Bart Aernouts 7:39:24 with the day's fastest bike (4:07:19) and Anne Reischmann 8:38:08; swim fastest 39:48 despite weaker current; 16 pro DNFs.
Sources
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