IRONMAN Western Australia
Course breakdown, historical weather, field analysis, and pacing notes.
A fast, flat course in Busselton
Busselton, Australia · December 6, 2026
IRONMAN Western Australia takes place in Busselton, Australia on December 6, 2026. The full-distance course covers a 3.80 km swim, 180.4 km bike with 66m of climbing, and a 42.4 km run.
- Swim
- 3.8 km
- Ocean_sheltered
- Bike
- 180.4 km
- ↑79m · Flat
- Run
- 42.4 km
- ↑65m · Flat
- Air Temp
- 11–26°C
- Water Temp
- 20°C
- Wind
- 21 km/h
- S
Swim Course
Ocean_sheltered swim — 3.80 km
Athletes face a 3.80 km swim in ocean_sheltered conditions. Wetsuits are permitted and recommended at this water temperature.
- Ocean_sheltered swim
- 20°C average water temperature
- 6 sharp turns
Bike Course
A fast, flat 180.4 km ride
The bike course covers 180.4 km across flat terrain with 66m of total climbing. Watch for 8 U-turns that break rhythm and require careful braking.
- 66m total elevation gain
- 0.4 m/km average gradient
- 8 U-turns
- 123 sharp turns
- Flat terrain profile
Run Course
Fast, flat 3-lap run course
The run covers 42.4 km with 66m of climbing. Athletes complete 3 laps, so crowd support and mental pacing strategies play a big role. With 8 U-turns, maintaining rhythm through the turnarounds is key.
- 66m total elevation gain
- 1.6 m/km average gradient
- 8 U-turns
- 74 sharp turns
- 3 laps
- Flat terrain profile
Race Day Conditions
Warm conditions on race day
Based on historical averages, expect temperatures around 21°C on race day. Winds average 21 km/h — power-based pacing on the bike is more important than speed targets.
Race Field Insights
How the Field Performs
Aggregated from 4,455 finishers (2022–2025)
- Total Starters
- 4,744
- Finishers
- 4,455
- DNF Rate
- 5.9%
- Years of Data
- 2022–2025
- Median Finish
- 12h 04m
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 01m | 1h 08m | 1h 18m | 1h 28m | 1h 41m |
| Bike | 4h 59m | 5h 23m | 5h 53m | 6h 27m | 7h 02m |
| Run | 3h 32m | 3h 56m | 4h 33m | 5h 20m | 6h 06m |
| Finish | 9h 53m | 10h 51m | 12h 04m | 13h 35m | 14h 59m |
Plan IRONMAN Western Australia with Keiro
Get a complete pacing strategy for every discipline — built from this course, forecast weather, and your fitness.
Independent analysis. KeiroLabs is not the event organizer and is not affiliated with the race organizer.