IRONMAN 70.3 Rio de Janeiro 2027
A 70.3 in Rio: a swim at Copacabana, a city bike via Botafogo, Flamengo and the Marcello Alencar Tunnel, and a three-lap run around the Aterro do Flamengo.
44 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? 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.
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.
“The bike passes through the Marcello Alencar Tunnel, so practise riding through tunnels and changes of light. The run is three predominantly flat laps around the Aterro do Flamengo.”
The race
The course
Swim at Copacabana. Wetsuits are legal at 24.5°C (76.1°F) or colder, up to 5 mm thick, and prohibited above that.
Leaves Copacabana for the city centre via Botafogo, Flamengo and Santos Dumont Airport, following the Marcello Alencar Tunnel to the Rodoviária Novo Rio at km 15.
Three laps of about 21 km in total around the Aterro do Flamengo on a predominantly flat course beside the city's beaches.
Not yet confirmed for this edition: bike elevation gain, cut-off times, aid station spacing, water temperature history, course maps (not checked against official GPX), exact run distance (stated as 21 km), 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 Rio de Janeiro course page on 4 October 2026. Courses change; the official page is always the last word.
Questions, answered
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Read before you race
Half Ironman Recovery Time: A Practical Return
How Much Harder Is a Full IRONMAN Than a 70.3?
IRONMAN 70.3 Tallinn Training Guide
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This listing is for information only. Unbroken is not affiliated with, endorsed by, or sponsored by IRONMAN 70.3 Rio de Janeiro 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.