Singapore T100 Triathlon 2027
A T100 weekend at Marina Bay, Singapore, with a reservoir swim, an undulating bike and a flat run. The 100 km race is a 2 km swim, 80 km bike and 18 km run, with a Sprint, duathlons and relays alongside.
27 weeks to race day: base season
Plenty of runway. This far out, the win is a boring, consistent base rhythm: aerobic volume, strength, technique. The structured block starts closer in; what you do now decides how high it can climb.
Building for this one? T100 training support cover the sessions, the weekly shape and how the block is paced. The R.A.C.E. Framework explains why it is built that way.
Build my complete road.
Commit to the date and the work gets a shape: your countdown starts, the emails arrive in step with your build, and the app anchors a recovery-led block so the final week lands exactly on race day.
One confirmation email, then the road begins. Registering for the race itself stays with the organiser.
“Heat and humidity are the planning problem: the organiser lists 26-34°C air temperature and 25-28°C water. Acclimatise where you can, practise fuelling and hydration in the heat, and rehearse the transitions between disciplines in the 2-80-18 format.”
The race
The course
The 100 km format starts with a 2 km swim; the Sprint swims 750 m. The organiser lists the Marina Bay reservoir with average water temperature of 25-28°C.
80 km for the 100 km format and 20 km for the Sprint. The organiser describes the bike course as undulating.
18 km for the 100 km format and 5 km for the Sprint. The organiser describes the run as flat. The event also lists a Long Duathlon (9 km / 64 km / 9 km), a Standard Duathlon (6 km / 32 km / 3 km) and a Youth Aquathlon (400 m swim / 3 km run), with team relays for the 100 km, Sprint and Standard Duathlon.
Not yet confirmed for this edition: lap counts, route map, elevation gain, wetsuit rules, cut-off times, transition locations, entry prices. We publish these only once they are on the official course page, so check there before you pace off anything here.
Course details verified against the official Singapore T100 Triathlon course page on 3 October 2026. Courses change; the official page is always the last word.
Questions, answered
When is Singapore T100 Triathlon 2027?
What distances can I race at Singapore T100 Triathlon?
How hard is the course?
What is the swim like?
How long do I need to train for it?
How do I enter?
Read before you race
Recovery After a Sprint Triathlon: What to Do Next
Your First Triathlon.
Your first open water swim this year: make it boring
More races like this
This listing is for information only. Unbroken is not affiliated with, endorsed by, or sponsored by Singapore T100 Triathlon or its organiser. Details are based on publicly available information; names are used descriptively to identify the event. For accurate, up-to-date information and entry, always use the official event website.