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IRONMAN Switzerland Thun
IRONMAN Switzerland Thun is raced in Thun, Switzerland (Swim 3.8 km · Bike 180.2 km · Run 42.2 km). Results from 3 editions (2024–2026), the course, race-day weather and water temperature.
- SwimLake
- BikeHilly
- RunFlat
- High air temp27°C81°F
- Low air temp17°C63°F
- Avg. water temp17°C63°F
Temperatures: race-hours average over 1 editions
IRONMAN Switzerland Thun results
Fastest men
7:49:20
Leonard Arnold · 2025
Fastest women
8:42:40
Julie Derron · 2026
Fastest edition
2025
median 12:01:23
Avg. age group · 2026
12:27:05
swim 1:21:47 · bike 6:18:32 · run 4:29:54
| Edition | Date | Finishers | Men | Women | Median | |
|---|---|---|---|---|---|---|
| 2026 | Jul 5, 2026 | 1928 | Benjamin Ueltschi 8:29:45 | Julie Derron 8:42:40 | 12:15:59 | Pacing |
| 2025 | Aug 24, 2025 | 1449 | Leonard Arnold 7:49:20 | Jana Müller 9:47:33 | 12:01:23 | Pacing |
| 2024 | Jul 7, 2024 | 1291 | Pascal Franken 8:50:09 | Georgina Gadient 10:06:09 | 12:17:57 | Pacing |
IRONMAN Switzerland Thun course
The bike is hilly, with ≈2,100 m (6,890 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 · 178.8 km111 mi · ≈ +2,100 m6,890 ft · from 521 to 891 m1,709 to 2,923 ft
Run · 42.8 km26.6 mi · ≈ +10 m33 ft · from 560 to 564 m1,837 to 1,850 ft
Difficulty
#9 hardest of 42
vs. the average IRONMAN: +3.7% · swim +4.2% · bike +6.2% · run −0.3%
Elevation filtered for terrain-model noise; a bike computer may read differently.
IRONMAN Switzerland Thun weather & water temperature
| Edition | Air swim / bike / run | Wind | Rain | Water | AG wetsuit |
|---|---|---|---|---|---|
| 2026 | 17°C63°F / 23°C74°F / 27°C81°F | 2 km/h1 mph | 0.0 mm0.00 in | — | — |
Lake or river: the official temperature is announced on race morning. Wetsuit rules →
IRONMAN Switzerland Thun reviews
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