IRONMAN Tallinn
Course breakdown, historical weather, and field analysis.
The Baltic gem — medieval city meets modern IRONMAN
Tallinn, Estonia · August 22, 2026
IRONMAN Tallinn brings full-distance racing to Estonia's capital — one of the best-preserved medieval cities in Europe. A Baltic Sea swim, a flat bike through the Estonian countryside, and a city marathon. Estonia's efficient organisation and the unique charm of Tallinn's old town create a distinctive racing experience.
- Swim
- 4.0 km
- Ocean
- Bike
- 179.8 km
- ↑449m · Flat
- Run
- 43.1 km
- Flat
- Air Temp
- 10–22°C
- Water Temp
- 18°C
- Wind
- 16 km/h
- SW
Swim Course
Baltic Sea swim off the Tallinn coast
The swim takes place in the Baltic Sea near Tallinn. The Baltic offers calm, low-salinity water — almost like freshwater. Water temperatures in late August are around 18–21°C. The Estonian coastline provides a scenic but exposed swimming environment.
- Calm Baltic Sea — low salinity, almost freshwater
- Water temperature 18–21°C
- Estonian coastline setting
- Generally calm conditions
Bike Course
Flat Estonian roads through the countryside
The 180 km bike course heads through the flat Estonian countryside. Estonia's terrain is predominantly low-lying, making this a fast course with minimal climbing. The roads are straight and open, and the flat landscape means wind is the primary variable. This is a course for time trialists and power riders who can hold a steady output.
- Flat Estonian terrain — minimal climbing
- Fast course for power riders
- Wind exposure on open countryside
- Good road surfaces
Run Course
Marathon through Tallinn — medieval meets modern
The marathon takes athletes through Tallinn's mix of medieval old town and modern city. The UNESCO-listed old town with its cobblestone streets and Gothic spires provides one of the most unique running backdrops in IRONMAN racing. The terrain is flat to gently undulating, and Estonian spectators provide warm, enthusiastic support.
- UNESCO World Heritage old town backdrop
- Medieval cobblestone streets and Gothic architecture
- Flat to gently undulating terrain
- Warm Estonian community support
Race Day Conditions
Baltic late summer — comfortable with autumn approaching
Late August in Tallinn offers comfortable racing conditions as summer begins to transition toward autumn. Air temperatures range from 14–22°C. The Baltic influence keeps conditions mild. Rain is possible, and evenings can cool quickly. This is one of the more temperature-friendly full-distance events in late season.
Race Field Insights
How the Field Performs
Aggregated from 4,004 finishers (2021–2025)
- Total Starters
- 4,255
- Finishers
- 4,004
- DNF Rate
- 4.8%
- Years of Data
- 2021–2025
- Median Finish
- 11h 45m
Finish Time Distribution
How the Median Finisher Spends Race Day
What Each Pace Looks Like
Fast | Solid | Median | Back of Pack | Slow (P90) | |
|---|---|---|---|---|---|
| Swim | 1h 06m | 1h 13m | 1h 22m | 1h 31m | 1h 43m |
| Bike | 4h 56m | 5h 19m | 5h 48m | 6h 24m | 7h 00m |
| Run | 3h 28m | 3h 49m | 4h 19m | 4h 58m | 5h 45m |
| Finish | 9h 49m | 10h 40m | 11h 45m | 13h 09m | 14h 33m |
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Independent analysis. KeiroLabs is not the event organizer and is not affiliated with the race organizer.