#RedefiningTriathlon

Important announcement!

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27-28 July

|

London

100KM

Triathlon

TRIATHLON

27-28 July

|

London

100KM

Triathlon

2025 – Be The First To Hear!

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Sign-up below to register your interest for the 2025 London T100 event and receive the latest updates including exclusive partner news/offers from T100 and priority entry!

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Distance

100 KM

Swim

2 km

Bike

80 km

Run

18 km

2024 100km distance sold out!

SIGN-UP TO BE THE FIRST TO HEAR ABOUT 2025 ENTRY

Join the UK’s biggest city triathlon, swimming in Royal Victoria Dock and racing on roads closed to traffic alongside London’s most memorable landmarks for a bucket-list triathlon experience in a truly iconic location.

Overview

This summer, long distance triathlon graces the streets of London! As we build upon the legacy of the London triathlon, this is your chance to join the UK’s biggest city triathlon, as you swim through Royal Victoria Dock and race alongside London’s most memorable landmarks. The London T100 offers one of our most expansive selection of event types and places are selling fast – don’t miss the opportunity to be part of something special!

Overview

break your limit. Join the race.

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Watch
2024
Highlights

Benefits

You Won't Want To Miss This!

100km: The Ultimate Test

Whether you're new to tri or a seasoned competitor, the 100km distance is an endurance challenge like no other.

UNIQUE T100 RACE PACK WITH ENTRY

Included with every triathlon entry is your Official T100 race T-Shirt, Race Bag, and much more.

FOLLOW IN THE PROS' FOOTSTEPS

Join the global triathlon family and race on the closed roads just like the world's top professional triathletes.

Race On The Streets Of London

Line up in Britain’s capital and join one of the world’s biggest triathlons, as you race past iconic sites like Big Ben.

Enter The Race

Sold Out!

The 2023 PTO Asian Open held in Singapore’s awe-inspiring Marina Bay offers an unprecedented swim location and spectacular city circuit course, for a one of a kind event not to be missed.

28

July

100km

Super Early Bird

100km Triathlon

Distance

100KM

Swim

2KM

Bike

80KM

Run

18KM

From

SGD

Sold Out

Including GST +
4.9% registration fee

28

July

100km

Early Bird

100km Triathlon

Distance

100KM

Swim

2KM

Bike

80KM

Run

18KM

From

£

sold out

Including GST +
4.9% registration fee

From

28

July

100km

General Entries

100km Triathlon

Distance

100KM

Swim

2KM

Bike

80KM

Run

18KM

From

£

SOLD OUT

Including GST +
4.9% registration fee

28

July

100km

Final Entries

100km Triathlon

Distance

100KM

Swim

2KM

Bike

80KM

Run

18KM

From

£

SOLD OUT

Including GST +
4.9% registration fee

Singapore T100 Age-Group Open
Three reasons you should race the 100km distance

GENERAL REFUNDS

We understand that sometimes things just don’t go to plan! That’s why we have an industry leading refund policy to help you feel confident in signing up for our events.

  1. 50% refund until 30 days prior to race day (request in writing)
  2. 25% up to 7 days prior to race day (request in writing)
  3. No refund after 7 days prior to race day

GENERAL REFUNDS

We understand that sometimes things just don’t go to plan! That’s why we have an industry leading refund policy to help you feel confident in signing up for our events.

  1. 50% refund until 30 days prior to race day (request in writing)
  2. 25% up to 7 days prior to race day (request in writing)
  3. No refund after 7 days prior to race day

Contact Us

Need help or have more questions? Don’t hesitate to get in touch.

Participant Info

Join Us In London!

Gallery

2023 moments

Other events

London T100 hosts a selection of triathlon event distances so no matter your experience or ability, there’s the chance to take in this iconic race on closed roads.