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Triathlons Found In Summer 2025

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Triathlons In Summer 2025

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

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

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Race Calendar: Triathlons Summer 2025

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London T100 Triathlon 2025

London
09 Aug 25 - 10 Aug 25
£128.00 - £420.00

Harwich Triathlon

Harwich, Essex
07 Jun 25
£50.00

Dorney Triathlon- June 2025

Windsor, Berkshire
07 Jun 25
£60.00 - £101.00
4.6

Château de Chantilly Triathlon & Duathlon

Chantilly, Oise
07 Jun 25 - 08 Jun 25
£35.00 - £245.00

Offer

10% OFF

Slateman Triathlon & Duathlon

Caernarfon, Gwynedd
08 Jun 25
£85.99 - £399.99

The One on the River - Marlow

Marlow, Buckinghamshire
08 Jun 25
£25.00 - £110.00
5.0

Royal Windsor Triathlon

Windsor, Berkshire
15 Jun 25
£87.00 - £192.00

Plymouth Triathlon

Mount Edgcumbe, Cremyl
15 Jun 25
£25.44 - £127.20

The Saxon Triathlon

Northampton, Northamptonshire
15 Jun 25
£38.00 - £125.00

ATW Stewartby Lake Triathlon & Aquabike

Stewartby Lake, Green Ln, Bedford MK43 9LY
15 Jun 25
£72.08 - £127.20

The One for the Planet powered by Climategames

Windsor
15 Jun 25
£25.00 - £75.00

Cholmondeley Castle Triathlon & Multisport

Malpas, Cheshire, Cheshire East
21 Jun 25 - 22 Jun 25
£35.00 - £245.00

Offer

10% OFF

Bowood House Triathlon June 2025

Calne, Wiltshire
21 Jun 25
£37.00 - £322.00

Menai Holidays ABERSOCH Triathlon

Abersoch, Gwynedd
21 Jun 25
£85.00 - £90.00

Darwen Triathlon, Aquathlon & Runs

Darwen, Lancashire
22 Jun 25
£24.00 - £67.00
4.0

The Cardiff Triathlon & Duathlon

Cardiff
22 Jun 25
£78.99 - £229.99

Twyford Kids Triathlon

Polehampton Church of England Junior School, Kibblewhite Crescent, Reading RG10 9AX
22 Jun 25
£21.14 - £30.56

Swim Bike Run

Herne Bay, Kent
28 Jun 25
£20.00

UK Ultimate Triathlon 2025

Ellesmere, Shropshire
29 Jun 25
£105.00 - £349.00
5.0

English Riviera Triathlon

The Kings Drive, Torquay, Devon, TQ2 5JE
29 Jun 25
£31.80 - £85.86

Arrow Valley Sprint Triathlon

Redditch, Worcestershire
29 Jun 25
£89.00

Thorpe Park Sprint Triathlon

Chertsey, Surrey
29 Jun 25
£67.00 - £322.00

The Northumbrian Full & Half Iron-Distance Triathlon & Trails Runs

Hexham, Northumberland
29 Jun 25
£40.00 - £350.00
5.0

Dorney Evening Triathlon

Windsor, Buckinghamshire
02 Jul 25
£60.00 - £80.00
5.0

ATW Odyssey Triathlon

Riverside Park, Regatta Meadow, St Neots, Cambridgeshire, PE19 7AB
05 Jul 25
£164.30 - £312.70

The FixAddiction Triathlon

Windsor, Buckinghamshire
05 Jul 25
£60.00

ATW St Neots Triathlon - Race 2

Riverside Park, Regatta Meadow, St Neots, Cambridgeshire, PE19 7AB
06 Jul 25
£61.48 - £127.20

ATW Bristol Triathlon

Brunel Lock Rd, Cumberland Basin, Bristol,
06 Jul 25
£79.50 - £132.50

Conquer The Chilterns Triathlon

Henley-on-Thames, Oxfordshire
12 Jul 25
£68.00 - £108.00

Upton Tri + Duathlon

Worcester, Worcestershire
12 Jul 25
£50.00 - £85.00

Dorney Triathlon

Windsor, Berkshire
13 Jul 25
£60.00 - £101.00
4.6

The One on the River - Marlow

Marlow, Buckinghamshire
13 Jul 25
£25.00 - £110.00
5.0

Belvoir Castle Triathlon & Mulitsport

Grantham, Belvoir, Leicestershire
19 Jul 25 - 20 Jul 25
£35.00 - £245.00
5.0

Offer

10% OFF

Birmingham Triathlon 2025

Sutton Coldfield, West Midlands
19 Jul 25
£99.00 - £119.00

Guildford Triathlon & Kids Aquathlon

Guildford, Surrey
20 Jul 25
£27.00 - £52.00

Bedford Team Triathlon Relays

Bedford
20 Jul 25
£183.00

TriBourne Festival of Endurance

Eastbourne, East Sussex
20 Jul 25
£46.00 - £399.00

Compton Verney Sprint Triathlon

Warwick, Warwickshire
20 Jul 25
£70.00 - £85.00

On The Edge Middle Distance Triathlon

Warwick, Warwickshire
20 Jul 25
£165.00 - £181.00
5.0

Dorney Triathlon

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

Cowman Triathlon

Olney, Buckinghamshire
03 Aug 25
£63.00 - £136.50
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