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IRONMAN 70.3 World Championship 2027

Chattanooga, Tennessee

28 – 29 August 2027 Triathlon 70.3 World ChampionshipTwo-day eventCourse to be revealed

The IRONMAN 70.3 World Championship in Chattanooga on 28-29 August 2027, with a river swim. The bike and run courses had not yet been revealed.

Terrain

Not yet published

The course had not been revealed on the pages read

Elevation

Not yet published

The course had not been revealed on the pages read

Swim

River

The organiser lists a river swim; the venue and course details were not yet published on the pages read.

Wetsuit

Not stated by the organiser

Region

Tennessee

Chattanooga, Tennessee

Your runway

47 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.

Recover

Consider recovery context, sleep and readiness before adding training load.

Align

Fit the plan to your actual life, not the one you wish you had.

Condition

Minimum effective dose. The right sessions, done fresh.

Execute

Race-week protocol, pacing, contingency. Nothing new on race day.

Build my complete road Predict your finish time

Building for this one? 70.3 training plan covers the sessions, the weekly shape and how the block is paced. The R.A.C.E. Framework explains why it is built that way.

Road to Race

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.

Already have the app, or want it? The app takes this race and builds the block around it.

“The bike and run courses had not been revealed when this page was written, so build general 70.3 fitness and revisit once the organiser publishes them. The championship runs over 28-29 August 2027.”

Abraham Spring: founder, Unbroken

The race

IRONMAN 70.3 World Championship is on Saturday 28 August 2027. Swim: The organiser lists a river swim; the venue and course details were not yet published on the pages read. Bike: The organiser says the bike course will be revealed at a later time. Run: The organiser says the run course will be revealed at a later time. The organiser does not state bike elevation gain, cut-off times, wetsuit rules, swim venue, bike course, run course, which day each group races and bike lap count on the pages read, so those details are not given here.

The course

Swim1.9 km

Lap count not published

The organiser lists a river swim; the venue and course details were not yet published on the pages read.

Bike90 km

Lap count not published

The organiser says the bike course will be revealed at a later time.

Run21.1 km

Lap count not published

The organiser says the run course will be revealed at a later time.

Not yet confirmed for this edition: bike elevation gain, cut-off times, wetsuit rules, aid station spacing, water temperature history, course maps (not checked against official GPX), swim venue, bike course, run course, which day each group races, bike lap count. 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 IRONMAN 70.3 World Championship course page on 4 October 2026. Courses change; the official page is always the last word.

Questions, answered

When is IRONMAN 70.3 World Championship 2027?

IRONMAN 70.3 World Championship takes place on 28 – 29 August 2027.

What distances can I race at IRONMAN 70.3 World Championship?

70.3. Pick the distance that fits your training runway, not your ego: the right distance is the one you can arrive at fresh.

How hard is the course?

Not yet published terrain, not yet published profile. The course had not been revealed on the pages read

What is the swim like?

The organiser lists a river swim; the venue and course details were not yet published on the pages read.. Not stated by the organiser. Practise open water before race week, not during it.

How long do I need to train for it?

Race day is 28 – 29 August 2027. For the 70.3, a proper recovery-led build wants about 12 weeks, which means starting around 5 June 2027. Later starts still work: the block compresses honestly rather than pretending, and it always anchors to the exact race date.

How do I enter?

Entries are handled by the organiser. Use the Register button above: it goes straight to the official site.

Read before you race

Half Ironman Recovery Time: A Practical Return

A practical 70.3 recovery guide covering the first 72 hours, the first easy sessions and a response-led return to structured training.

How Much Harder Is a Full IRONMAN Than a 70.3?

The distance doubles, but the preparation, fuelling, durability and recovery cost rise by much more than two.

IRONMAN 70.3 Tallinn Training Guide

Prepare for Tallinn's freshwater swim, fast bike demands and compact 21.1 km run with a specific, recoverable training block.

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This listing is for information only. Unbroken is not affiliated with, endorsed by, or sponsored by IRONMAN 70.3 World Championship 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.

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