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IRONMAN 70.3 Westfriesland
IRONMAN 70.3 Westfriesland is raced in Hoorn, Netherlands (Swim 1.9 km · Bike 90 km · Run 21.1 km). Results from 3 editions (2024–2026), the course, race-day weather and water temperature.
- SwimLake
- BikeFlat
- RunFlat
- High air temp23°C73°F
- Low air temp18°C65°F
- Avg. water temp18°C64°F
Temperatures: race-hours average over 3 editions
IRONMAN 70.3 Westfriesland results
Fastest men
3:43:38
Mathias Lyngsø Petersen · 2025
Fastest women
4:12:25
Marlene De Boer · 2025
Fastest edition
2025
median 5:34:53
Avg. age group · 2026
5:51:06
swim 41:21 · bike 2:53:40 · run 2:05:09
| Edition | Date | Finishers | Men | Women | Median | |
|---|---|---|---|---|---|---|
| 2026 | Jun 21, 2026 | 1666 | Sam Steltenpool 3:49:33 | Emily Bogen 4:30:10 | 5:47:33 | Pacing |
| 2025 | Jun 22, 2025 | 1618 | Mathias Lyngsø Petersen 3:43:38 | Marlene De Boer 4:12:25 | 5:34:53 | Pacing |
| 2024 | Jun 23, 2024 | 1628 | Andrii Kuzminskyi 4:01:49 | Ilse Paulis Meyrick-Cole 4:31:08 | 5:36:16 | Pacing |
IRONMAN 70.3 Westfriesland course
The bike is flat, with ≈30 m (98 ft) of climbing on the bike and ≈10 m (33 ft) of climbing on the run.
Swim Bike Run · Watch the replay on the map →
Bike · 91.4 km57 mi · ≈ +30 m98 ft · from -4 to 4 m-13 to 13 ft
Run · 21.2 km13.2 mi · ≈ +10 m33 ft · from -1 to 2 m-3 to 7 ft
Difficulty
#89 hardest of 125
vs. the average IRONMAN 70.3: −2.3% · swim +2.1% · bike −3.0% · run −2.4%
Elevation filtered for terrain-model noise; a bike computer may read differently.
IRONMAN 70.3 Westfriesland weather & water temperature
| Edition | Air swim / bike / run | Wind | Rain | Water | AG wetsuit |
|---|---|---|---|---|---|
| 2026 | 20°C67°F / 22°C71°F / 24°C75°F | 13 km/h8 mph | 0.1 mm0.00 in | 18°C65°F * | Legal |
| 2025 | 21°C69°F / 23°C74°F / 23°C74°F | 15 km/h9 mph | 0.8 mm0.03 in | 18°C65°F * | Legal |
| 2024 | 15°C58°F / 18°C64°F / 21°C70°F | 7 km/h4 mph | 0.4 mm0.02 in | 16°C61°F * | Legal |
* Satellite estimate (sea surface at start time). Wetsuit rules →
IRONMAN 70.3 Westfriesland reviews
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