0045

Triathlons Found In the South East

View all ↓

Triathlons | South East | 2026 - 2027

The most comprehensive list of Triathlons in the South East. Discover, compare and book the best South East Triathlons!

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

Popular & Featured

London

London

Race Calendar: Triathlons In The South East

ATW Big East & Maldon Triathlon

Promenade Park, Park Drive, Maldon, Essex, CM9 5JQ
Sat 16 May 26
£73.14 - £196.10
5.0

ATW Box End Mixed Team Relay

Box End Lakes,Box End Rd, Bedford MK43 8RN
Sat 23 May 26
£38.16 - £148.40

ATW Box End Triathlon

Box End Lakes,Box End Rd, Bedford MK43 8RN
Sun 24 May 26
£73.14 - £127.20

ATW Centurion 100KM Triathlon Box End

Box End Lakes,Box End Rd, Bedford MK43 8RN
Sun 24 May 26
£106.00 - £153.70

Marlow Triathlon

Marlow, Buckinghamshire
Sun 24 May 26
£72.00 - £152.00

Dorney Lake Evening Triathlon - May

Windsor, Berkshire
Wed 27 May 26
£60.00 - £80.00
5.0

One on the River - Marlow Triathlon

Marlow, Buckinghamshire
Sun 31 May 26
£26.68 - £117.37

Henley Triathlon 2026

Henley-on-Thames, Oxfordshire
Sun 31 May 26
£89.00 - £99.00
4.3

Dorney Lake Triathlon - June

Windsor, Berkshire
Sat 06 Jun 26
£60.00 - £122.00
4.6

One for the Planet - Dorney Lake Triathlon

Windsor, Berkshire
Sun 14 Jun 26
£26.68 - £85.40

Royal Windsor Triathlon

Windsor, Berkshire
Sun 14 Jun 26
£92.00 - £152.00

Southend Triathlon

Car park area of Uncle Toms Cabin, Shoebury Common Road, Southend-on-Sea, SS3 9HG
Sun 21 Jun 26
£53.28 - £116.95

ATW Stewartby Lake Triathlon & Aquabike

Stewartby Lake, Green Ln, Bedford MK43 9LY
Sun 21 Jun 26
£73.14 - £127.20

Dorney Lake Evening Triathlon - July

Windsor, Berkshire
Wed 01 Jul 26
£60.00 - £80.00
5.0

The FixAddiction Triathlon

Windsor, Buckinghamshire
Sat 04 Jul 26
£60.00
5.0

The Bridge Triathlon

The Bridge, Dartford,  DA1 5PR
Sun 05 Jul 26
£47.26 - £94.32

ATW Odyssey At Box End Triathlon

Box End Lakes,Box End Rd, Bedford MK43 8RN
Sun 05 Jul 26
£73.14 - £196.10

Dorney Lake Triathlon - July

Windsor, Berkshire
Sun 12 Jul 26
£60.00 - £122.00
4.6

Eastbourne Triathlon and Multisport Festival

Eastbourne, East Sussex
Sun 12 Jul 26
£17.00 - £259.00

The One on the River - Marlow Summer Triathlon

Marlow, Buckinghamshire
Sun 12 Jul 26
£26.68 - £117.42

Castle To Coast Triathlon

Dorney Lake,
Sat 18 Jul 26
£270.00 - £295.00

Marlow Triathlon

Marlow, Buckinghamshire
Sun 19 Jul 26
£72.00 - £152.00

Eton Dorney Family Triathlon

Dorney Lake, Court Lane, Windsor, SL4 6QP
Sun 19 Jul 26
£44.16 - £93.62

London T100 Triathlon 2026

London
Sat 25 Jul 26 - Sun 26 Jul 26
£88.00 - £488.00

Dorney Lake Triathlon 26th July

Windsor, Berkshire
Sun 26 Jul 26
£60.00 - £122.00
4.6

Guildford Triathlon & Kids Races

Guildford, Surrey
Sun 26 Jul 26
£27.00 - £67.00

Cowman Triathlon

Olney, Buckinghamshire
Sun 02 Aug 26
£68.00 - £141.50
5.0

The Bridge Childrens Triathlon

Dartford Bridge
Sun 02 Aug 26
£27.39 - £36.81

Dorney Lake Triathlon August

Windsor, Berkshire
Sat 08 Aug 26
£60.00 - £122.00
4.6

The Bedford Triathlon

Bedford, Bedfordshire
Sun 16 Aug 26
£60.00 - £100.00
5.0

Thorpe Park Sprint Triathlon

Chertsey, Surrey
Sun 23 Aug 26
£87.00
5.0

Dorney Lake Evening Triathlon - August

Windsor, Berkshire
Wed 26 Aug 26
£60.00 - £80.00
5.0

Dorney Lake Triathlon August

Windsor, Berkshire
Sun 30 Aug 26
£60.00 - £122.00
4.6

One on the Lake - Dorney Lake Triathlon

Windsor, Berkshire
Sun 06 Sep 26
£26.68 - £85.40

Brighton & Hove Triathlon and Multisport Festival

Hove, East Sussex
Sun 06 Sep 26
£21.00 - £149.00

Bridge August 2nd Triathlon

Dartford, Kent
Sun 06 Sep 26
£68.17

Tri Reigate Sprint & Standard Triathlon

Betchworth, Surrey
Sun 13 Sep 26
£87.00 - £97.00

Woking Autumn Triathlon & Junior Aquathlon

Woking Leisure Centre, Woking Park, Kingfield Road, Woking, GU22 9BA
Sun 13 Sep 26
£20.00 - £74.50

Votwo Dorney Lake Triathlon

Windsor, Berkshire
Sun 20 Sep 26
£62.00 - £97.00
4.5

One on the River - Henley Triathlon

Henley-on-Thames, Oxfordshire
Sun 20 Sep 26
£26.68 - £117.42
Showing 1-40 of 45 results
Prev
1 2
Next

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