All Triathlons, Duathlons & Ironmans in the United Kingdom: An overview of upcoming triathlon races in the UK.
Dates for all triathlon events in Great Britain, including registration, course, schedule, results and more details.
To the overview of all races in the United Kingdom in our triathlon calendar:
Triathlons 2026 in the United Kingdom: Top-Events
Cholmondeley Castle Multisport Festival
 | 21.06.2026 ✔ |
| |
 | Cheshire |
 | Triathlon / Duathlon / Aquabike / Swim / Run |
Belvoir Castle Multisport Festival
| 18.07.2026 ✔ |
| |
| Grantham |
| Triathlon / Duathlon / Aquabike / Swim / Run |
London T100 Triathlon (Challenge London)
| 26.07.2026 ✔ |
| |
| London |
| Mitteldistanz / Olympische Distanz / Sprint / Super Sprint |
Hever Castle Multisport Festival
| 26.09.2026 ✔ |
| |
| Edenbridge |
| Triathlon / Duathlon / Aquabike / Swim / Run |
More sports in Great Britain (England, Scotland, Wales & North Ireland):
- Running in the UK - All Races [Running Calendar]
- Marathons in the UK
- Half Marathons in the UK
- 5 km Runs in the UK
- 10 km Runs in the UK
- Ultra Runs, Ultra Marathons & Trails in UK
- Trail Runs & Ultra-Trails in UK
- Sky Runs & Mountain Runs in United Kingdom
- Obstacle Races & Mud Runs in United Kingdom
- Relay Races in the United Kingdom
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