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Triathlon Calendar East of England 2025-2026

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Explore the best triathlons in East of England for 2025-2026! Our updated list features 30 exciting races across the region. Find your next race in East of England below and join the running community at these great events!

December 2025
Dec
21
Su

Can But Tri Adult Duathlon Series

Duathlon
January 2026
Jan
18
Su

Can But Tri Adult Duathlon Series

Duathlon
February 2026
Feb
8-9
Su - Mo

Can But Tri Adult Duathlon Series

Duathlon
March 2026
Mar
8
Su

Can But Tri Adult Duathlon Series

Duathlon
Mar
22
Su

Can But Tri Spring Enduro Duathlon

Duathlon
April 2026
Apr
19
Su

Can But Tri Adult Duathlon Series

Duathlon
May 2026
May
3
Su

ATW St Neots Triathlon

Triathlon
May
10
Su

HSV Sprint Triathlon

Triathlon
May
16
Sa

Essex Triathlons - Hanningfield Reservoir

Triathlon
May
16
Sa

ATW Big East & Maldon Triathlon

Triathlon
May
24
Su

ATW Box End Triathlon

Triathlon
May
24
Su

ATW Centurion 100km Triathlon Box End

Triathlon
June 2026
Jun
7
Su

ATW Grafman Middle Distance Triathlon

Triathlon
Jun
13-14
Sa - Su

Harwich Triathlon

Triathlon
Jun
21
Su

Southend Triathlon

Triathlon
Jun
21
Su

ATW Stewartby Lake Triathlon & Aquabike

Triathlon
Jun
28
Su

As Keen As Mustard Grafham Water Swimrun Event

Aquathlon
July 2026
Jul
4-5
Sa - Su

Outlaw Holkham Weekend

Triathlon 2 mi 5 km ... 13 mi 56 mi
Jul
5
Su

ATW Box End Triathlon

Triathlon
Jul
6
Mo

Hitchin Tri

Triathlon