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Triathlon Calendar South East (England) 2025-2026

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Explore the best triathlons in South East (England) for 2025-2026! Our updated list features 52 exciting races across the region. Find your next race in South East (England) below and join the running community at these great events!

October 2025
Oct
4
Saturday

Dorney Lake Duathlon

Duathlon
Oct
4
Saturday

Dorney Duathlon

Duathlon
Oct
5
Sunday

Thruxton Mass Attack Duathlon

Duathlon
November 2025
Nov
9
Sunday

Dorney Lake Duathlon

Duathlon
Nov
9
Sunday

Dorney Duathlon

Duathlon
December 2025
Dec
13
Saturday

Dorney Lake Duathlon

Duathlon
April 2026
Apr
19
Sunday

Southampton Fast Twitch

Triathlon
May 2026
May
4
Monday

Tonbridge Triathlon

Triathlon
May
24
Sunday

The Bewl Water Triathlon

Triathlon
May
24
Sunday

Marlow Triathlon

Triathlon
June 2026
Jun
7
Sunday

Dartford White Oak Triathlon

Triathlon
July 2026
Jul
19
Sunday

Marlow Triathlon

Triathlon
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