100 km · 22 August 2027
London T100
London, United Kingdom
The race at a glance
- Circuit
- T100
- Distance
- 100 km
- Terrain
- Road
- Swim
- 2 km
- Bike
- 80 km
- Run
- 18 km
- Date
- 22 Aug 2027
- Registration
- Open
- Swim venue
- Harbour
- Bike profile
- Flat
- Run profile
- Flat
- High air temperature
- 21 °C
- Low air temperature
- 18 °C
- Altitude
- 16 m
Edition history
| 2026 | Held | |
|---|---|---|
| 2025 | Held | |
| 2024 | Held |
How the day is laid out
The swim is held in a harbour. The wetsuit call is made on race morning, against the temperature measured then.
The organiser publishes 2 km of swimming, 80 km on the bike and 18 km of running.
The bike course is flat.
The run course is flat.
Typical temperatures for the month run from 18 to 21 °C.
Entries for 2027 are open
On 4 November 2026, the Register Now buttons of the London T100 page led to the 2027 entry platform for the races of 21 and 22 August 2027. The event lists a 100 km race (2 km, 80 km, 18 km), an Olympic and a sprint race, plus relays. The page describes a freshwater swim, 18 to 24 °C on average, with wetsuits mandatory.
Source: London T100, read on 4 November 2026. Entries are made with the organiser.
Against the calendar
Where this race sits among the others
Ranks are computed across every race of the same distance.
High air temperature
21 °C · median 23 °C
The 2nd coolest of the 20 100 km races with a figure, across every circuit.
8
races of this distance pair a flat bike with a flat run, out of 20. 8 share the bike profile alone.
42
races across every distance fall in August, out of 354.
160
races are held in Europe. 32 of them in the same month as this one.
Questions about this race
- When is London T100 2027?
- London T100 is held on 22 August 2027 in London, United Kingdom. Registration is open on the official race page.
Where to stay
Hotels and rentals around the race venue, for the nights around race day.
Suggested stay: 20 Aug 2027 to 23 Aug 2027
The map is provided by Stay22. Bookings are made with the provider.
Races of the same distance in the same region
- Anfi Challenge Mogán-Gran Canaria
Mogán (Anfi del Mar), Spain
- Date
- 17 Apr 2027
- Distance
- 100 km
- Country
- ES
- Challenge Salou-Costa Daurada
Salou, Spain
- Date
- 9 May 2027
- Distance
- 100 km
- Country
- ES
- Challenge Cesenatico
Cesenatico, Italy
- Date
- 16 May 2027
- Distance
- 100 km
- Country
- IT
- OMNi-BiOTiC® Apfelland Triathlon
Stubenberg am See, Austria
- Date
- 23 May 2027
- Distance
- 100 km
- Country
- AT
- The Championship
Šamorín, Slovakia
- Date
- 23 May 2027
- Distance
- 100 km
- Country
- SK
- Triathlon International d'Obernai-Benfeld – L
Benfeld, France
- Date
- 6 Jun 2027
- Distance
- 100 km
- Country
- FR
- Challenge Gdańsk
Gdańsk, Poland
- Date
- 20 Jun 2027
- Distance
- 100 km
- Country
- PL
- Challenge Kaiserwinkl-Walchsee
Walchsee, Austria
- Date
- 27 Jun 2027
- Distance
- 100 km
- Country
- AT
Entries are handled by the organiser
Registration and the athlete guide are on the official race page.