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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 49 exciting races across the region. Find your next race in South East (England) below and join the running community at these great events!

September 2025
Sep
26
Friday

Invesco Charity Challenge

Multisport
Sep
27
Saturday

Dorney Triathlon

Triathlon
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
2
Sunday

Seasonal Duathlons

Duathlon
Nov
9
Sunday

Dorney Lake Duathlon

Duathlon
Nov
9
Sunday

Dorney Duathlon

Duathlon
December 2025
Dec
13
Saturday

Dorney Lake Duathlon

Duathlon
Dec
13
Saturday

Dorney Duathlon

Duathlon
January 2026
Jan
18
Sunday

Dorney Lake Duathlon

Duathlon
Jan
18
Sunday

Dorney Duathlon

Duathlon
February 2026
Feb
7
Saturday

Dorney Lake Duathlon

Duathlon
Feb
7
Saturday

Dorney Duathlon

Duathlon
March 2026
Mar
8
Sunday

Dorney Lake Duathlon

Duathlon
Mar
8
Sunday

Dorney Duathlon

Duathlon
April 2026
Apr
4
Saturday

Dorney Lake Duathlon

Duathlon
Apr
4
Saturday

Dorney Duathlon

Duathlon
Apr
19
Sunday

Southampton Fast Twitch

Triathlon
May 2026
May
2
Saturday

Dorney Lake Triathlon

Triathlon
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