Compiled and fact-checked by Tommo, Verus founder · Last verified August 2026 · Spot an error?
Triathlon · T100
T100 London 2027
- Race day
- Saturday, 21 August 2027
- Location
- London, UK
- Distance
- 100 km total
2km swim 80km bike 18km run
T100 London: 21 August 2027 — the ExCeL Docklands swim/bike/run course, a split-time calculator, and real Verus athletes racing it.
345 days to go
Key Race Metrics & Overview
- Date
- Saturday, 21 August 2027
- Venue
- ExCeL London, Royal Victoria Dock, London E16 1XL
- Distance
- T100 — 100km total
- Start Time
- TBC — exact wave times aren't published yet for 2027. The most recent edition (25-26 July 2026) was an amateur-only weekend; London's paired pro race was replaced that year by WTCS.
- Draft-Legal Bike
- No — non-drafting
- Cut-Off
- No official cut-off times are published yet for 2027. As a guide, the 2026 100km bike leg required all outbound ('teal') lap cyclists to be past Tower Bridge Approach by 11:35 and all final-lap ('pink' lap) cyclists to have started their last lap by 12:32; the 100km run required the last lap to be started by 14:13. Treat these as recent precedent, not a promise — they'll be recalculated for 2027 and published closer to the event.
Also this weekend
It is a two-day weekend, and which day you race depends on your distance. Saturday 21 August 2027 is the short-course day: Super Sprint (400m / 10km / 2.5km) and Sprint (750m / 20km / 5km). Sunday 22 August 2027 is the main day, carrying the full T100 (2km / 80km / 18km) and the Olympic distance (1.5km / 40km / 10km). Sprint and Olympic can each be taken on as a relay by a team of two or three, a leg each — much the easiest way into a race of this size if the full distance is not the point. The 2026 edition ran two separate Olympic course variants, a Docklands loop and a Westminster one passing Big Ben and Tower Bridge; the 2027 listing shows a single Olympic course, so treat the Westminster variant as unconfirmed until the organiser publishes the courses.
Super Sprint
1 swim lap / 1 bike lap / 1 run lap in the 2026 lap structure — the shortest option at the same venue.
Sprint
1 swim lap / 2 bike laps / 2 run laps in 2026. Reported bike length varies slightly by source (17-20km).
Olympic — Docklands course
2 swim laps / 5 bike laps / 4 run laps in 2026, all around Royal Victoria Dock.
Olympic — Westminster course
In 2026 this was 1 swim lap, one long "teal" bike lap via Big Ben and Tower Bridge plus a shorter "pink" Docklands lap, then 4 run laps.
Leg 1 of 3
Swim — 2km
Two laps of Royal Victoria Dock, with an "Aussie exit" (a brief run across a pontoon or beach) between laps.
- Venue
- Royal Victoria Dock
- Elevation gain
- No official figure published — see notes above
- Surface
- Dock — still water.
Wetsuit: Compulsory up to 25°C, prohibited above it, per the 2026 event information and a British Triathlon rule exemption specific to this event. If the dock is too warm, a published Non-Wetsuit Contingency Plan kicks in: a mandatory tow-float for every athlete and shortened swim distances (2026 example: the 100km swim cut from 2km to 1km, Olympic from 1.5km to 750m).
Leg 2 of 3
Bike — 80km
Three laps on closed urban roads through Docklands and central London — the 2026 100km bike leg was run as three "teal" laps, the same lap type used on the Olympic Westminster course.
- Venue
- Docklands and central London, closed roads
- Elevation gain
- No official figure published — see notes above
- Surface
- Closed road — flat, urban.
Non-drafting
Leg 3 of 3
Run — 18km
Multiple laps alongside Royal Victoria Dock (reported as four to five laps depending on the year, each around 3.6km). In 2026 the 100km run was four laps of roughly 4.1km each (a 600m run-out, 1km run-in), totalling 18km.
- Venue
- Royal Victoria Dock, Docklands
- Elevation gain
- No official figure published — see notes above
- Surface
- Closed road / dockside path — flat.
Wetsuit outlook
Will you need a wetsuit at T100 London?
Water temperature at enclosed dock in August has typically been 18.6°C, ranging from 16.8°C to 20°C in eight of every ten years. Against British Triathlon's thresholds for this race's 2000m swim, that means:
Wetsuit optional — and recommended
Between 16°C and 24.6°C the choice is yours. Rule 4.2(b) recommends a wetsuit for all novices and age-groupers up to 22°C.
What would have happened in each of the last 16 years
- Optional (recommended)16 of 16
What the organiser says
Compulsory up to 25°C, prohibited above it, per the 2026 event information and a British Triathlon rule exemption specific to this event. If the dock is too warm, a published Non-Wetsuit Contingency Plan kicks in: a mandatory tow-float for every athlete and shortened swim distances (2026 example: the 100km swim cut from 2km to 1km, Olympic from 1.5km to 750m).
Estimated from air-temperature history — no direct measurement of this water exists, and small, shallow venues tend to run a degree or two warmer than shown. The official temperature is taken an hour before the start, and only that reading decides the rule on the day.
Transitions
A single transition zone at ExCeL London serves both T1 (swim-to-bike) and T2 (bike-to-run).
T100 London Split Calculator
T100 London Split-Time Calculator
Enter your own swim, bike and run pace to project a real finish time.
Projected Finish Time
5:03:00
Racing a different distance? Try the generic split calculator or the swim pace calculator.
Where T100 London starts and finishes
These are the start and finish points, not the route. Verus doesn't hold course files for this race, and drawing a line between two pins would be a guess you might end up training on. The official course map is the one to use: view it on the organiser's site .
What you can qualify for
Every T100 event is a qualifier for the Qatar T100 Triathlon World Championships. The organiser advertised ten world-championship slots per age group for 2026 (held 10-13 December 2026 in Lusail); British Triathlon has since confirmed 20 slots per age group for the 2027 championships — double the 2026 allocation — though the 2027 Qatar event's own dates haven't been published yet. This is the main thing that separates T100 London from the other big-city triathlons — you can qualify for a world championship on closed roads in Docklands.
Entry & Ballot
Direct entry summary
T100 is organized by the Professional Triathletes Organisation (PTO) and pairs an elite pro race with mass-participation age-group racing at most venues — though London's 2026 edition ran amateur-only, with WTCS taking the pro slot instead. For 2027, the PTO and World Triathlon jointly announced a restructured "Triathlon World Tour" (September 2026): London (21-22 August 2027) sits on the new T50 World Championship Tour — the rebranded WTCS elite series — rather than the T100 elite tour, so expect elite short-course racing alongside the mass-participation weekend again, not a T100 pro field. The 100km age-group race is currently open for "priority access" sign-up only; full registration and pricing haven't been published yet, and it continues to double as a qualifier for the T100 Age-Group World Championships in Qatar.
Ballot policy
Not a ballot — priority access sign-up now, with full registration to follow. No pricing is confirmed yet for 2027.
Age requirement
No official minimum age was confirmed in research for this event.
Charity Places
Badu is the official charity partner; no specific charity-place fee or fundraising-minimum structure is published.
Race Day Info & Checklist
On the day
- A single transition zone at ExCeL London serves both T1 and T2.
- Powerade is a confirmed event partner, though exact on-course station placement is not published.
- A free "T100 Watch Party" venue with a big screen and live commentary runs inside ExCeL for spectators.
- Race pack (2026 precedent): a security wristband, swim cap, race bib, a set of temporary tattoos and a sticker sheet for your bike and helmet — plus three colour-coded transition bags (swim-to-bike, bike-to-run, after-race) for 100km entrants only. Wristband and bike number must match to reclaim your bike afterwards.
- Timing chip is worn on the left ankle and is reusable — in 2026 there was a £60 charge for any chip not returned after the race.
- No headphones or mobile phones are permitted at any point during the race — 2026 rules treated this as a penalty or disqualification offence.
- Drafting is illegal on the bike leg (12m draft zone, 25 seconds allowed to complete a pass). 2026 penalties: 30 seconds for a first offence at Sprint/Super Sprint before disqualification, one minute at Olympic before disqualification, and two minutes for each of a first and second offence at the full 100km before disqualification on a third.
- On-course nutrition (2026 precedent): pre-filled bike bottles of Maurten Drink Mix 160 plus Maurten Gel 100 and caffeinated Gel 100 Caf 100 were provided on the bike leg for 100km and Olympic entrants on the Sunday only — Sprint and Super Sprint athletes carry their own bike nutrition. All run legs had water, Maurten drink mix and gels, cola, food (bananas) and ice at three aid stations per lap.
- Every finisher gets a medal, with the option to buy a personalised "iTAB" engraved plate for it; FinisherPix photographs the course and finish line and finisher photos are free to download.
- No dogs are allowed inside ExCeL or the Event Village (assistance/guide dogs excepted) — this applies to spectators as well as athletes.
Checklist
- Wetsuit, goggles and swim cap (cap usually provided in your race pack)
- Bike, helmet (mandatory) and bike shoes, racked at the ExCeL transition zone per the race-morning schedule
- Run shoes and race-day nutrition for the 80km bike and 18km run legs
- A transition bag or mat to keep T1/T2 kit organized
- Your timing chip, fitted per your race pack instructions
- A permanent pen to fill in the medical details on the back of your race number
- A meeting point agreed with family/friends at the T100 Watch Party venue for afterwards
Transport, Spectating & Where to Stay
Transport
DLR, the Elizabeth Line, and the Emirates Cable Car all serve ExCeL — recommended over driving given road closures around the venue. In 2026, Prince Regent (DLR) was closest at 0.1 miles, Custom House (Elizabeth Line and DLR) 0.5 miles, with Canning Town (Jubilee Line, 1.6 miles), West Ham (1.8 miles) and Stratford (3.5 miles) as further options. Bikes are allowed on the Elizabeth Line and DLR at weekends, limited to two bikes per set of doors.
No dedicated Park & Ride scheme is confirmed; public transport is the recommended option given Docklands road closures. ExCeL car parking itself was charged at £25/day in 2026 and had to be pre-booked online — the lower level had a 1.9m height restriction (roof racks/bikes need the upper level), and disabled bays cost the same £25 but must be booked in advance, with an £80 fine for parking in one without a valid badge. Confirm 2027 pricing on the official site nearer the date.
Closed roads through Docklands and central London for the bike leg; full details are confirmed by organizers closer to race day.
Spectator guide
The 2026 event introduced a free "T100 Watch Party" venue inside ExCeL with a giant screen and live commentary — a strong single vantage point rather than needing to move around the course.
DLR/Elizabeth Line/Cable Car access (Custom House, Prince Regent) is recommended for moving between viewing points given road closures.
Where to stay
Royal Docks / ExCeL
+ Closest to the venue, with several hotels directly on-site or a short walk away.
– Can book up quickly and command a premium on race weekend.
Canary Wharf
+ A short DLR ride away, with a much wider range of hotels.
– Not walkable — you'll need transport on race morning.
Frequently Asked Questions
When is the next T100 London?
21-22 August 2027 — currently open for priority access sign-up only, with full registration and pricing not yet published. The most recent edition ran 25-26 July 2026.
What distances does T100 London offer?
The full 100km T100 distance (2km swim / 80km bike / 18km run), plus Super Sprint, Sprint, and two Olympic-distance course variants, all at the same ExCeL venue the same weekend.
Is T100 London draft-legal?
No — T100 is a non-drafting format for both the pro and age-group bike legs, in contrast to draft-legal series like WTCS.
Can amateurs enter T100 London?
Yes — every T100 venue (London included) pairs the elite pro race with open, mass-participation age-group entry at the same 100km distance, plus shorter options. It isn't invite-only, though the 100km age-group race doubles as a T100 Age-Group World Championship qualifier.
Will there be a pro race at T100 London 2027?
Not a T100 pro race — the PTO and World Triathlon's September 2026 restructuring put London on the new T50 World Championship Tour (the rebranded WTCS elite series) rather than the T100 elite tour for 2027. Expect elite short-course racing on race weekend again, similar to how WTCS paired with the 2026 event, rather than a T100 pro field. Confirm the exact elite schedule on the official site closer to the date.
Is the T100 London course flat?
Yes — swim, bike and run all run through flat Docklands/central London terrain on closed roads and the dockside. No official elevation-gain figures are published for any leg.
How do I get to T100 London?
DLR, the Elizabeth Line, and the Emirates Cable Car all serve ExCeL (Custom House and Prince Regent stations) — recommended over driving given road closures.
When were T100 London results published?
Not yet — results can't exist before the race happens. They'll be added here (or on the official results page) once the 2027 edition is done.
What are the T100 London 2027 dates?
The weekend runs 21-22 August 2027. Saturday 21 August is the short-course day — Super Sprint and Sprint. Sunday 22 August is the main day, carrying both the full T100 (2km swim, 80km bike, 18km run) and the Olympic distance. Check which day your entry is for before booking travel; a lot of people assume the whole weekend is Sunday.
Can you qualify for the T100 World Championships at London?
Yes — every T100 event is a qualifier for the Qatar T100 Triathlon World Championships. Ten slots per age group were advertised for 2026; British Triathlon has confirmed 20 slots per age group for 2027, so the odds of qualifying through London have effectively doubled.
Can you do T100 London as a relay?
Yes, at Sprint and Olympic distance, in a team of two or three with a leg each. The full 100km distance is an individual race. A relay is the most realistic way into the weekend for someone who is strong in one discipline but not yet racing all three.
How hard is the T100 distance compared with a 70.3?
The T100 is 100km all in — 2km swim, 80km bike, 18km run — against 113km for a 70.3. The bike is around 10km shorter and the run about 3km shorter, but the swim is longer, and the shorter bike tends to be raced harder rather than easier. Treat it as a middle-distance race, not a soft option.
What is the swim like at T100 London?
Two laps of Royal Victoria Dock with an Aussie exit between them — a short run across a pontoon before you go back in. Dock water is still and sheltered, which makes it one of the more forgiving open-water swims in UK racing, and there is no current or chop to fight.
Do you need a wetsuit for T100 London?
The 2026 event information made wetsuits compulsory up to 24.9°C, which in practice means you will be wearing one — a London dock does not reach that in August. Confirm against the 2027 athlete guide when it is published, since thresholds are set per event.
Where can spectators watch T100 London?
The whole race is built around Royal Victoria Dock, with a single transition at ExCeL serving both T1 and T2, and lapped bike and run courses. That means a spectator standing in one place sees their athlete repeatedly rather than twice — unusually good for a race of this distance. In 2026 the organiser also ran a free indoor Watch Party at ExCeL with a big screen and commentary.
How much does T100 London cost?
Not published for 2027. Entry opened as priority-access sign-up ahead of full registration, and Verus does not estimate a price. Check the official site before budgeting.
Is T100 London good for a first middle-distance triathlon?
The course is about as friendly as the distance gets — a flat, sheltered dock swim, closed urban roads with no significant climbing, and a flat lapped run. What it will not do is ease the distance itself. If you are stepping up, the Olympic or a relay on the same weekend gives you the atmosphere without the 100km.
What's in the T100 London race pack?
2026 precedent: a security wristband (must stay on to reclaim your bike), a swim cap, a race bib, a set of temporary tattoos, and a sticker sheet for your helmet and bike's seatpost. 100km entrants also get three colour-coded transition bags — black for swim-to-bike, red for bike-to-run, and white for after-race gear. Every finisher also gets a T100-branded backpack or drawstring bag and a T-shirt, plus a finisher medal after the race.
Is there a live tracking app for T100 London?
In 2026 there was — the "T100 Athlete Tracker App" (iOS and Android) gave spectators live splits, route maps and results, running from the Saturday morning of race weekend. It has not been reconfirmed for 2027 yet, but it ran the previous year and is the kind of feature likely to return.
What happens if the dock is too warm for wetsuits at T100 London?
British Triathlon's rule exemption for this event makes wetsuits mandatory up to 25°C and prohibited above it. If the dock does run too warm on the day, a published Non-Wetsuit Contingency Plan applies instead: every athlete swims with a mandatory tow-float (issued dockside), and swim distances are shortened across every race category — in 2026 that meant the 100km swim cut from 2km to 1km and the Olympic swim from 1.5km to 750m. Bike and run cut-offs stay the same either way.
What are the drafting penalties at T100 London?
T100 London's bike leg is non-drafting, policed by a 12-metre draft zone and a 25-second limit to complete an overtake. In 2026 a first drafting offence cost 30 seconds at Sprint/Super Sprint before disqualification on a repeat, one minute at Olympic before disqualification, and two minutes for each of a first and second offence at the full 100km, with disqualification on a third.
What nutrition is available on the T100 London course?
2026 precedent: pre-filled bike bottles of Maurten Drink Mix 160, plus Maurten Gel 100 and a caffeinated Gel 100 Caf 100, were handed out on the bike leg — but only for the 100km and Olympic distances on the Sunday; Sprint and Super Sprint athletes carry their own bike nutrition. Every run leg had water, Maurten drink and gels, cola, bananas and ice at three aid stations per lap.
Do you get a medal at T100 London?
Yes — every finisher gets a medal, collected on race day, with the option to personalise it with an engraved 'iTAB' plate ordered separately. Top-three age-category finishers in each distance get a placing medal as well. FinisherPix photographs the course and finish line, and finisher photos are free to download.
How much does parking cost at T100 London?
ExCeL's own car park was £25 per day in 2026, pre-booked online rather than paid on arrival. The lower level has a 1.9m height restriction, so anyone with a roof rack or a high/wide vehicle needs the upper level. Given the road closures around the venue, public transport (DLR, Elizabeth Line, or the Emirates Cable Car) is the organiser's recommended option over driving.