0020

Triathlons Found In September 2025

View all ↓

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.

Popular & Featured

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

Triathlon Y Bala

Bala, Gwynedd
07 Sep 25
£80.99 - £105.99

The One on the Lake - Dorney

Windsor, Berkshire
07 Sep 25
£25.00 - £75.00

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

Tri Reigate Sprint Triathlon

Betchworth, Surrey
13 Sep 25
£82.00 - £362.00

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

Tri Reigate Standard Triathlon

Betchworth, Surrey
14 Sep 25
£92.00 - £407.00

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 1-20 of 20 results

Cookie settings

Cookies are small text files that a website stores on a user's device, such as a computer or a smartphone. When a user visits a website, a cookie may be set to track information such as the user's preferences, login information, or items in a shopping cart. Cookies are not harmful and are typically deleted when a user clears their browser cache or the cookie expires.

Strictly necessary cookies are a type of cookie that is essential for a website to function properly. These cookies are necessary to provide services requested by the user, such as login authentication, shopping cart functionality, and other similar features.

Strictly necessary cookies do not require the user's consent, as they are essential for the proper functioning of the website.

Learn more about our Strictly necessary cookies

Tracking and targeting cookies are a type of cookie used by websites to collect information about a user's browsing behaviour across multiple websites. These cookies are often used for advertising purposes and can track the user's interests and some personal information.

Targeting cookies are used to display personalised advertisements to the user based on their browsing history, search history, and other online activity.

Learn more about our Tracking and targeting cookies