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Olympic Distance Triathlons Found In September 2025​

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Olympic Distance Triathlons In September 2025

The most comprehensive list of Olympic Distance Triathlons in September 2025. Discover, compare and book the best September 2025 Olympic (aka Standard) Distance Triathlons near you!

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October

Race Calendar: Olympic Distance Triathlons September 2025​

The One on the Lake - Dorney

Windsor, Berkshire
07 Sep 25
£25.00 - £75.00

Triathlon Y Bala

Bala, Gwynedd
07 Sep 25
£80.99 - £105.99

ATW Grafham Triathlon

Grafham Water Visitor Centre, Marlow Park, Grafham, Huntingdon, Cambs, PE28 0BH
13 Sep 25
£82.68 - £127.20
4.7

Sundowner Triathlon

Allerthorpe Lakeland Park, Melbourne Road, Pocklington, York YO42 4RL
13 Sep 25
£63.88 - £138.17

Cheltenham Tri Festival

Cheltenham, Gloucestershire
14 Sep 25
£50.00 - £90.00

The Brutal Triathlons & Seriously Brutal Duathlons

Caernarfon, Gwynedd
20 Sep 25 - 21 Sep 25
£95.00 - £355.00

ATW Big East & Maldon Triathlon

Promenade Park, Park Drive, Maldon, Essex, CM9 5JQ
21 Sep 25
£82.68 - £190.80
5.0

The One on the River - Henley

Henley-on-Thames, Oxfordshire
21 Sep 25
£25.00 - £110.00

Dorney Lake Triathlon

Windsor, Berkshire
21 Sep 25
£62.00 - £97.00
4.4

Superfeet Sandman - Triathlon & Duathlon

Llanfairpwllgwyngyll, Gwynedd
21 Sep 25
£69.99 - £224.99

Dorney Triathlon

Windsor, Berkshire
27 Sep 25
£60.00 - £122.00
4.6

Hever Castle Triathlon & Multisport

Edenbridge, Kent
27 Sep 25 - 28 Sep 25
£35.00 - £245.00

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