If you're lining up in Cozumel this November, you've probably heard the course called flat and fast. The flat part is accurate. There's barely any climbing on the bike, and the run doesn't have a hill worth naming. What the profile hides is the east side of the island, a long exposed stretch of coast road where the trade winds hit you head on or from the side three separate times. Riders who pace the sheltered west side like a time trial tend to meet that wind on the third loop with nothing left, and then they still have a marathon to run in Caribbean heat.
Race Overview
IRONMAN Cozumel first ran in 2009, making it the first full distance IRONMAN in Mexico, and it has been held every year since. The race has a long history of strong Athletes' Choice results, and in both the 2024 and 2025 awards it finished second in the Latin America region in every full distance category, from overall satisfaction to best swim, bike, and run course. For many North American athletes it's become the go-to late season race, a chance to close out the year with a fast course and a few days on the beach afterward.
For 2026, the race is set for Sunday, November 22, with starts beginning at 7:00 a.m. It carries the Latin American Championship title and offers age group qualifying slots for the 2027 IRONMAN World Championship, which means the front of each age group is racing for a ticket while most of the field is chasing a personal best or a first finish. The island also hosts a 70.3 in September, and plenty of athletes in the full distance field will have raced these roads before.
Course Description
The swim is a 2.4 mile point to point course along the island's west coast, finishing at Chankanaab Park, where T1 sits. Athletes enter the water, swim roughly 100 meters out to the first buoy, then turn left and swim about 3.5 kilometers in a nearly straight line south with the current, before a pair of left turns brings them back in to the Chankanaab exit. The water is clear enough to see the reef below, and the current usually works in your favor, but veterans warn that it can be strong and unpredictable if you haven't swum in moving ocean water before. If the north wind has been blowing for a few days before the race, expect chop on top of it. Plan on a non-wetsuit swim. Water temperatures in late November typically sit around 80 to 82 degrees, well above the wetsuit legal cutoff, so pack a swimskin.
The bike is three counterclockwise laps of the island's southern loop road. Riders head south along the west coast through the hotel zone, swing around the southern tip near Punta Sur, then turn north up the undeveloped east coast before cutting back across the island toward town. The road is smooth and closed to traffic, and elevation gain is minimal. Published figures land around 1,150 feet for the full ride, though like most flat courses the number varies depending on how it's measured. Athletes have also reported for years that the course measures closer to 113 miles than 112, so don't panic when your head unit ticks past the expected distance.
The east side is where this bike leg gets decided. Prevailing winds come off the water from the east and northeast, and the coast road on that side sits right at the shoreline with nothing to block them. On a typical day the west side feels fast, with the wind at your back or sheltered by the island, and the east side becomes a long grind into a headwind or crosswind. The wind usually builds through the morning, so loop one on the east side is the easiest it will be all day and loop three is the hardest. Historically, disc wheels have been banned here because of those crosswinds. Confirm the current rule in the 2026 athlete guide before you pack.
The run is three out and back laps along the waterfront in San Miguel, a little under nine miles each. It's flat apart from small dips built into the road for rain drainage, and the town end of each lap brings big crowds while the far end gets quiet. The finish is downtown. Breaking 26.2 miles into six segments helps mentally, but the reality is that the third lap happens in the warmest part of the day, and humidity on this island has decided more than one race here.
Forecasted Weather
Late November in Cozumel sits at the start of the drier season, after the summer rains and the peak of hurricane season have passed. Daytime highs typically land in the low to mid 80s, with mornings in the low 70s, and humidity is lower than it is in summer but still high by the standards of most athletes flying in from colder places. Brief tropical showers are possible. Wind is the weather variable that matters most, generally out of the east or northeast and stronger in the afternoon, and it hits hardest on the east side bike sections and the exposed stretches of the run. Sea temperature around 81 degrees means a non-wetsuit swim in almost every year. If you're coming from a northern winter, get some heat exposure in the weeks before you travel.
Why This Course Rewards a Best Bike Split Plan
Cozumel is a flat course where the hard part comes from the side instead of from below. That makes it easy to ride well for 60 miles and badly for the last 50. A BBS race plan for IRONMAN Cozumel 2026 will:
- Set different targets for the west and east sides of the island. With a sheltered or tailwind assisted west coast and an exposed, wind facing east coast, the same power number produces very different speeds on each half of the loop. A plan built on your actual CdA and the forecast wind tells you where watts buy real time and where they don't.
- Pace loop three before you ride loop one. The trade winds typically build through the morning, which means the east side gets harder each time you see it. A plan that accounts for that keeps you from riding the first loop at a number you can't hold when the third loop turns into a headwind slog.
- Protect the marathon from the heat. Three run laps in Caribbean humidity, with the last one landing in the hottest part of the day, punish anyone who spent their reserves chasing a bike split. A plan built for the full 140.6 keeps enough in the legs to run that third lap instead of walking it.
- Keep a fast swim from setting the tone. The current assisted swim can hand you a split well ahead of what you'd swim in a pool, and that early confidence tends to show up as an overcooked first bike loop. A plan grounded in your real numbers keeps the swim in perspective.
Interactive Race Plan and Course Map
This power plan was modeled for an athlete with an average CdA of 0.2544, an FTP of 250 watts and weighing 165 lbs. Want to see what your time would be on the 2026 IRONMAN Cozumel course? Try the Time Analysis feature below, where you can quickly adjust Drag, Power, Weight and Crr to your own values. Check out our demo race plan to see what a premium race plan looks like.
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| Interval | Int. Time | Total Time | Int. Dist. | Total Dist. | Grade | Speed | Power |
|---|---|---|---|---|---|---|---|
| #1 | 00:11:23 | 00:11:23 | 4.24 mi | 4.24 mi | +0.01 % | 22.34 mph | 171 w |
| #2 | 00:24:26 | 00:35:50 | 8.61 mi | 12.85 mi | +0.04 % | 21.12 mph | 175 w |
| #3 | 00:02:24 | 00:38:14 | 0.84 mi | 13.69 mi | -0.10 % | 20.95 mph | 175 w |
| #4 | 00:00:30 | 00:38:44 | 0.19 mi | 13.88 mi | -0.98 % | 22.35 mph | 162 w |
| #5 | 00:03:20 | 00:42:04 | 1.13 mi | 15.01 mi | +0.17 % | 20.41 mph | 178 w |
| #6 | 00:00:55 | 00:43:00 | 0.34 mi | 15.35 mi | -0.57 % | 21.79 mph | 167 w |
| #7 | 00:01:07 | 00:44:08 | 0.38 mi | 15.73 mi | +0.52 % | 20.24 mph | 182 w |
| #8 | 00:06:50 | 00:50:58 | 2.41 mi | 18.14 mi | -0.11 % | 21.11 mph | 174 w |
| #9 | 00:00:29 | 00:51:28 | 0.15 mi | 18.29 mi | +1.76 % | 17.65 mph | 198 w |
| #10 | 00:02:39 | 00:54:08 | 0.93 mi | 19.22 mi | -0.08 % | 20.85 mph | 173 w |
| #11 | 00:00:58 | 00:55:06 | 0.32 mi | 19.54 mi | +0.68 % | 19.90 mph | 186 w |
| #12 | 00:04:30 | 00:59:37 | 1.62 mi | 21.16 mi | -0.21 % | 21.54 mph | 171 w |
| #13 | 00:00:11 | 00:59:48 | 0.07 mi | 21.23 mi | +0.29 % | 21.75 mph | 179 w |
| #14 | 00:00:28 | 01:00:16 | 0.15 mi | 21.38 mi | +1.15 % | 18.86 mph | 192 w |
| #15 | 00:00:35 | 01:00:52 | 0.21 mi | 21.59 mi | -0.58 % | 21.07 mph | 166 w |
| #16 | 00:01:06 | 01:01:58 | 0.39 mi | 21.98 mi | +0.37 % | 20.87 mph | 181 w |
| #17 | 00:07:34 | 01:09:33 | 2.71 mi | 24.69 mi | -0.08 % | 21.43 mph | 173 w |
| #18 | 00:00:17 | 01:09:51 | 0.12 mi | 24.81 mi | -1.03 % | 23.09 mph | 154 w |
| #19 | 00:48:36 | 01:58:27 | 18.85 mi | 43.66 mi | +0.01 % | 23.27 mph | 171 w |
| #20 | 00:16:47 | 02:15:15 | 7.29 mi | 50.95 mi | 0.00 % | 26.06 mph | 166 w |
| #21 | 00:03:06 | 02:18:22 | 1.08 mi | 52.03 mi | 0.00 % | 20.85 mph | 178 w |
| #22 | 00:00:50 | 02:19:12 | 0.22 mi | 52.25 mi | +1.18 % | 15.48 mph | 196 w |
| #23 | 00:03:24 | 02:22:37 | 1.03 mi | 53.28 mi | -0.25 % | 18.10 mph | 179 w |
| #24 | 00:03:56 | 02:26:33 | 1.14 mi | 54.42 mi | +0.17 % | 17.35 mph | 185 w |
| #25 | 00:01:04 | 02:27:38 | 0.34 mi | 54.76 mi | -0.56 % | 18.73 mph | 175 w |
| #26 | 00:09:16 | 02:36:54 | 2.79 mi | 57.55 mi | -0.02 % | 18.03 mph | 182 w |
| #27 | 00:00:25 | 02:37:19 | 0.11 mi | 57.66 mi | +2.03 % | 15.68 mph | 208 w |
| #28 | 00:00:09 | 02:37:29 | 0.04 mi | 57.70 mi | +1.06 % | 14.04 mph | 194 w |
| #29 | 00:04:10 | 02:41:39 | 1.25 mi | 58.95 mi | +0.12 % | 17.90 mph | 183 w |
| #30 | 00:05:14 | 02:46:54 | 1.62 mi | 60.57 mi | -0.21 % | 18.57 mph | 179 w |
| #31 | 00:00:46 | 02:47:41 | 0.22 mi | 60.79 mi | +0.90 % | 16.58 mph | 194 w |
| #32 | 00:10:17 | 02:57:59 | 3.31 mi | 64.10 mi | -0.06 % | 19.29 mph | 179 w |
| #33 | 00:00:17 | 02:58:16 | 0.11 mi | 64.21 mi | -1.12 % | 22.37 mph | 151 w |
| #34 | 00:03:05 | 03:01:21 | 1.22 mi | 65.43 mi | +0.28 % | 23.70 mph | 175 w |
| #35 | 00:43:35 | 03:44:57 | 17.62 mi | 83.05 mi | -0.01 % | 24.26 mph | 170 w |
| #36 | 00:28:11 | 04:13:09 | 9.64 mi | 92.69 mi | +0.01 % | 20.50 mph | 179 w |
| #37 | 00:04:46 | 04:17:56 | 1.48 mi | 94.17 mi | +0.01 % | 18.53 mph | 181 w |
| #38 | 00:02:59 | 04:20:55 | 0.95 mi | 95.12 mi | 0.00 % | 19.18 mph | 180 w |
| #39 | 00:05:47 | 04:26:43 | 1.83 mi | 96.95 mi | -0.04 % | 18.99 mph | 180 w |
| #40 | 00:00:34 | 04:27:17 | 0.15 mi | 97.10 mi | +1.77 % | 15.41 mph | 201 w |
| #41 | 00:02:52 | 04:30:10 | 0.93 mi | 98.03 mi | -0.07 % | 19.27 mph | 178 w |
| #42 | 00:05:57 | 04:36:07 | 1.94 mi | 99.97 mi | -0.06 % | 19.55 mph | 178 w |
| #43 | 00:00:44 | 04:36:52 | 0.22 mi | 100.19 mi | +0.91 % | 17.42 mph | 193 w |
| #44 | 00:00:39 | 04:37:31 | 0.21 mi | 100.40 mi | -0.58 % | 19.35 mph | 172 w |
| #45 | 00:35:29 | 05:13:00 | 12.93 mi | 113.33 mi | +0.01 % | 21.85 mph | 175 w |
| Totals/Avg | 05:13:00 | 05:13:00 | 113.27 mi | 113.27 mi | +0.15% | 21.71 mph | 174.55 w |
No Categorized Climbs Found
To determine the category of a climb, we check if the grade is greater than or equal to 3.0% and if the climb distance is greater than or equal to 300 meters. If these conditions are met, the climb is considered significant, and its score is calculated.
Build your own personalized 2026 IRONMAN Cozumel power plan today! Sign up for a free Athlete Basic account to get started with your athlete profile and bike setup, then grab the 2026 IRONMAN Cozumel course to model your own race plan.
2026 IRONMAN Cozumel FAQs
Your target power depends on your FTP, body weight, bike setup, and finish time goal — not a generic number that applies to every rider. The variables that matter most are your current fitness, your aerodynamic position, and the specific demands of the 2026 IRONMAN Cozumel course. The best approach is to build a personalized plan in Best Bike Split using your actual athlete profile — you'll get a segment-by-segment power target based on your specific inputs rather than a one-size-fits-all recommendation.
Every course is different and requires its own unique pacing plan. On a multi-loop course, fatigue and wind shift between laps and what felt comfortable early can become unsustainable later. On an out-and-back, headwind in one direction becomes tailwind in the other — an asymmetry a flat power target can't account for. On a point-to-point or single-loop course, you only get one pass at every section with no opportunity to recalibrate. When you create a Best Bike Split race plan for 2026 IRONMAN Cozumel, we model the specific demands of that course so your pacing strategy reflects the race you're actually doing.
Significantly — and the effect varies depending on the course profile. On flatter courses, wind and aerodynamics become the dominant variables in your speed equation, more so than on courses where gradient naturally dictates effort. On climbing-heavy courses, your power-to-weight ratio and how you manage the descents matter most. A Best Bike Split race plan lets you model the specific conditions forecasted for 2026 IRONMAN Cozumel, so your targets reflect what you'll actually face on race day rather than what the course looks like on paper.
It depends on the course and how well you pace it. Flat, fast courses offer genuine PR potential but only if you execute correctly — without terrain to naturally regulate your effort, going out too hard early is easy and costly. Technical or hilly courses reward smart segment-by-segment pacing over raw fitness. Either way, a physics-based race plan from Best Bike Split gives you a realistic split prediction based on your actual profile so you know before race day what a well-executed bike leg looks like for you specifically.
Yes — and this is one of the most underused features. Once you've built your 2026 IRONMAN Cozumel race plan, you can export it directly to Zwift, TrainerRoad, or any ERG-mode trainer for indoor sessions, or push it to your Garmin, Wahoo, or Karoo for outdoor rides. Training on your actual race plan means you arrive at 2026 IRONMAN Cozumel already knowing what your target effort feels like at every section of the course — not just what the number says on paper.
