Guide
T100 triathlon: which weekend to race as an amateur
8 T100 weekends in the catalogue open a 100 km race to age-group athletes. The date, the water and the heat decide between them.
Where the figures come from
The T100 is the professional tour run by the Professional Triathletes Organisation (PTO) with World Triathlon. Each stop is also a race weekend open to amateurs. The race lists, distances and qualification rules below come from the official Participate page of each stop on t100triathlon.com, read on 15 October 2026.
Water and air temperatures, course profiles and climbing come from the race pages of the catalogue; temperatures are averages for the race date and place. The catalogue records the 100 km race of each weekend. Not every stop publishes everything: 1 of the 8 give a bike elevation gain. Dates and entry status change, so check the official page before booking travel. Entries are made with the organiser.
The calendar on t100triathlon.com, read on 20 October 2026, lists around twenty race weekends from November 2026 to December 2027, among them Abu Dhabi, Samarkand, Yokohama, Rome, Los Angeles, Hamburg, Weihai and Tauranga. Most of these only take priority-access requests for now. This guide compares the weekends recorded in the catalogue, not the whole tour.
What each weekend offers amateurs
From the official pages. Where entries have not opened, the organiser only takes priority-access requests.
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Dubai T100
13–15 November 2026. 100 km, Olympic and sprint, with relay options. Ocean swim at Al Mamzar, a new site for 2026.
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Saudi Arabia T100
27–28 November 2026. Priority access only so far. The race list shows a 100 km, a sprint with a relay option and a 5 km or 1 km kick-off run; the interest form also mentions an Olympic race.
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Qatar T100
10–12 December 2026, Lusail. The age-group world final (qualification only), a 100 km, a sprint and 5 km or 1 km runs.
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Gold Coast T100
20–21 March 2027. 100 km on 21 March, Olympic on 20 March, and a 10 km run whose date is still to be confirmed.
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Singapore T100
10–11 April 2027, Marina Bay. 100 km and sprint, both with a relay option, plus a long and a standard duathlon.
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Vancouver T100
14–15 August 2027. 100 km on 15 August, Olympic and sprint on 14 August.
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London T100
21–22 August 2027. Priority access only; the interest form lists 100 km, Olympic, sprint and relay races.
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Marbella T100
18–19 September 2027. A 100 km race only, which also serves as the Spanish age-group championship for FETRI members with a Spanish passport.
Choosing by season
The weekends in the catalogue fall in three blocks. 3 are in November and December, all in the Gulf: Dubai T100, Saudi Arabia T100, Qatar T100 Final. Gold Coast and Singapore follow in March and April. London, Vancouver and Marbella come in August and September.
A Gulf race in November comes after a northern summer of training. A March race in Australia asks a European athlete to build fitness through the winter, often indoors. The calendar guide applies the same reasoning to IRONMAN races.
Water and heat
Average water temperatures on race day run from °C to °C. At 26 °C or more: . At 21 °C or less: . The London page describes a freshwater swim and marks it as a wetsuit swim.
The air is the second filter. The hottest average afternoon is at Singapore T100, with 34 °C. For an athlete training through a northern autumn or winter, heat is the condition to prepare for in the Gulf and in Singapore.
Bike course and distance
Most bike courses are described as flat or rolling. Marbella T100 is the exception: the organiser describes a hilly 80 km into the mountains behind the coast, then a lightly undulating run. Where a bike gain is published, it ranges from 802 m at Vancouver T100 to 802 m at Vancouver T100, where the organiser lists the run on packed trail.
The 100 km format is 2 km of swimming, 80 km on the bike and 18 km of running. Against a 70.3, that is 100 m more swimming, 10 km less cycling and 3.1 km less running. The distances guide puts every format side by side.
Qualifying for the age-group final in Qatar
The Qatar T100 weekend hosts the T100 Age-Group World Championship over 100 km, organised with World Triathlon. Entry is by qualification only. The organiser states that each T100 event offers 10 qualification slots per age group; the Marbella page specifies that the top 10 of each age group qualify for the 2027 final.
Sources: Qatar T100 and Marbella T100.
San Francisco, the exception
The tour also stops in San Francisco in June. There, the amateur race is Escape From Alcatraz, over its own distances: 2.4 km of swimming, 29 km on the bike and 12.9 km of running.
The water averages 13 °C, the coldest of any race on the tour. It is not a 100 km race and does not lead to the Qatar final in the same way as the 8 weekends above.
Side by side
Four T100 weekends on the same rows
The Gulf in November, Australia in March, Canada in August, Spain in September. Swap any of them for a weekend you are considering.
Dubai T100
Gold Coast T100
Vancouver T100
Marbella T100
- Race 1 Dubai T100
- Race 2 Gold Coast T100
- Race 3 Vancouver T100
- Race 4 Marbella T100
- Circuit
- T100T100T100T100
- Distance
- 100 km100 km100 km100 km
- Terrain
- RoadRoadRoadRoad
- Swim
- 2 km2 km2 km2 km
- Bike
- 80 km80 km80 km80 km
- Run
- 18 km18 km18 km18 km
- Date
- 15 Nov 202621 Mar 202715 Aug 202718 Sept 2027
- Country
- United Arab EmiratesAustraliaCanadaSpain
- Registration
- OpenOpenOpenOpen
- Swim venue
- OceanBayOceanSea
- High air temperature
- 31 °C28 °C23 °C27 °C
- Low air temperature
- 25 °C22 °C15 °C24 °C
- Bike profile
- RollingFlatRollingHilly
- Bike elevation gain
- n/an/a802 mn/a
- Run profile
- FlatFlatFlatRolling
- Run elevation gain
- n/an/a13 mn/a
- Altitude
- 0 m12 m2 m22 m
- First edition
- 2024202620252027
- Swim start
- n/aRolling startRolling startn/a
Questions
What is the T100 distance?
A 2 km swim, an 80 km bike and an 18 km run, the distances the professionals race on the tour. The amateur 100 km race at each stop uses the same format.
Can amateurs race at T100 events?
Yes. Each of the 8 T100 weekends in the catalogue lists a 100 km race for age-group athletes, and most add an Olympic or a sprint race. Entries are made on t100triathlon.com.
How do you qualify for the T100 age-group world championship?
By finishing among the qualifiers of your age group at a T100 event: the organiser announces 10 slots per age group at each one. The final is held in Qatar in December. Details are on the Qatar T100 page.
Which T100 race has the coolest water?
Among the 100 km races, Dubai T100, Saudi Arabia T100, Qatar T100 Final, Gold Coast T100, Singapore T100, Vancouver T100, London T100, Marbella T100, with an average of °C on race day.
Can a T100 entry be refunded?
The organiser states that every T100 entry can be refunded at 50% up to 90 days before race day and at 25% up to 30 days before. The conditions are on its refund policy page.
Narrow the list, then compare
Open the finder on the T100 races and set the month or the water temperature.