136 events
Endurance races calendar 2025 - 2026 in the United Kingdom
ATW Grafham Triathlon
Grafham, United Kingdom
13 Sep, 2025 (Sat)
Triathlon
750 m
17 km
5 km
1500 m
38 km
10 km
This event also offers:Aquabike
From
90 EUR
Dyfi X Swimrun
Aberdyfi, United Kingdom
13 Sep, 2025 (Sat)
Swimrun
12 km
Map
From
60 EUR
IRONMAN 70.3 Weymouth
Dorset, United Kingdom
14 Sep, 2025 (Sun)
Triathlon
1.9 km
90.1 km
21.0975 km
Seriously Brutal Duathlon
Llanberis, United Kingdom
20 Sep, 2025 (Sat)
Duathlon
24.1 km
186.7 km
14.5 km
8 km
93.3 km
14.5 km
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See moreThe Brutal Extreme Triathlon
Llyn Padarn, United Kingdom
20 Sep, 2025 (Sat)
Triathlon
1.9 km
90.1 km
8 km
7.7 km
360.5 km
64.4 km
ATW Big East & Maldon Triathlon
Essex, United Kingdom
21 Sep, 2025 (Sun)
Triathlon
1500 m
40 km
10 km
750 m
25 km
5 km
This event also offers:Aquabike
From
90 EUR
Dawlish Triathlon
Dawlish Warren, United Kingdom
21 Sep, 2025 (Sun)
Triathlon
750 m
24 km
5 km
300 m
16 km
5 km
From
45 EUR
Eton Dorney Triathlons
Windsor SL4 6FJ, UK, United Kingdom
21 Sep, 2025 (Sun)
Triathlon
750 m
20 km
5 km
1.5 km
40 km
10 km
The One on the River - Henley
Buckinghamshire, United Kingdom
21 Sep, 2025 (Sun)
Triathlon
1900 m
78.5 km
20 km
1500 m
54 km
10 km
This event also offers:Swimming, Aquabike
From
29 EUR
IRONMAN Wales
Tenby, United Kingdom
21 Sep, 2025 (Sun)
Triathlon
3.8 km
180 km
42.195 km