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Triathlons Found In September 2025

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Triathlons In September 2025

The most comprehensive list of Triathlons in September 2025. Discover, compare and book the best September 2025 Triathlons near you!

Find A Race is the UK's most popular event listings website, with over 3 millions user a year using our database of over 2,500 events to discover, compare and book their next challenge.

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October

Race Calendar: Triathlons September 2025​

🚀Boosted

Dorney Lake Triathlon

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

THE ROC ENGLAND

Ulverston, Cumbria
06 Sep 25
£240.00

Salty Sea Dog Duathlons & Triathlons - September

Bournemouth, Bournemouth, Christchurch and Poole
06 Sep 25
£45.00 - £70.00
4.6

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

North West Triathlon 2025

Nantwich, Cheshire East
14 Sep 25
£89.00 - £99.00

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

Dawlish Triathlon

Dawlish Warren
21 Sep 25
£47.70 - £59.36

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

Offer

10% OFF

East Leake 'End of Season' Sprint Triathlon

Loughborough, Leicestershire
28 Sep 25
£30.00 - £54.00

Warwickshire Triathlon 2025

Stratford-upon-Avon, Warwickshire
28 Sep 25
£89.00 - £99.00
5.0

SALCOMBE BREWERY CO SPRINT TRIATHLON

North Sands, Salcombe TQ8 8LD
28 Sep 25
£69.19
3.8
Showing 1-18 of 18 results

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