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.
Train for this course
Make today's training serve IRONMAN 70.3 Tallinn.
Use the app to adapt the next session around readiness while keeping this race in view. UK athletes who want individual review can choose online coaching instead.
“Lake Raku removes the old sea-course uncertainty, but athletes should still prepare for cool open water and verify the race-day wetsuit ruling.”
Abraham Spring: founder, Unbroken
The race
Tallinn combines a clear freshwater swim in Lake Raku with a largely flat bike and a fast two-lap run beside Tallinn Bay. The compact race logistics and short airport transfer make it unusually straightforward for a destination 70.3, while cool water and exposed sections still deserve specific preparation.
Your race decision brief
The evidence, translated into a decision.
This is not another difficulty score. It connects verified course evidence to the athlete constraints you have already shared with Unbroken.
Start with the course reality below, then use your hours, experience and weakest discipline to test the fit.
Distance70.3Official catalogue
Bike loadNot publishedGPX-derived
Historical conditions19.8°C · 18 km/h wind10-year context
A single loop of Lake Raku: clear water, a sandy bed and an average depth of 6.4m. Deep, clean and calm, which is about as straightforward as an open water swim gets.
Bike90 km
Lap count not published
No course map
IRONMAN publishes no route file for this leg, so there is no course map to draw from.
Out of the city to the southern villages, back through Tutermaa towards Tallinn and the Unibet Arena, then out into the countryside again. The official page does not state a lap count.
Run21.1 km
2 laps
Two laps with Tallinn Bay alongside, finishing in front of the Unibet Arena, and eight aid stations across the course. Described as one of the fastest run courses in the world, which is a claim your pacing plan should take seriously in both directions.
Run elevation, drawn from the official GPX. The vertical scale is held at a fixed 200m so a flat course looks flat rather than being stretched to fill the chart.
Not yet confirmed for this edition: bike lap count, bike elevation gain, cut-off times, water temperature. We publish these only once they are on the official course page, so check there before you pace off anything here.
Bike GPXNot publishedStatus pending · sample unavailable · confidence pending
Run · GPX-derived21.1 km · 87m gainStatus observed · sample 985 route points · confidence high · verified 2026-08-13
Historical climate · historical_api13.2–19.8°C air · 18 km/h median daily max wind · 0.7 mm median rainStatus observed · sample 150 days · confidence high. Ten prior calendar years, 15-day window centred on the current race date; historical context, not a forecast.
Travel · official sourceTallinn Airport (TLL) · 10 kmStatus observed · sample not applicable · confidence high. The official race centre, partner hotel and airport are within a 10km radius. A car is not required.
Observed finishing evidenceAwaiting 50+ authorised resultsStatus pending · sample 0 · confidence pending. No modelled score is presented as observed performance.
IRONMAN 70.3 Tallinn takes place on 23 August 2026.
What distances can I race at IRONMAN 70.3 Tallinn?
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?
Road terrain, flat profile. Coastal roads and medieval old town
What is the swim like?
Lake Raku, fresh water. Race-day measurement determines wetsuit status; the official course page lists approximately 18°C. Practise open water before race week, not during it.
How long do I need to train for it?
Race day is 23 August 2026. For the 70.3, a proper recovery-led build wants about 12 weeks, which means starting around 31 May 2026. Later starts still work: the block compresses honestly rather than pretending, and it always anchors to the exact race date.
How do I enter?
This edition has passed. Check the official event page for any future edition, entry status and pricing once the organiser publishes them.
Photograph of Tallinn, Estonia: William John Gauthier from Denmark, CC BY-SA 2.0, via Wikimedia Commons. Not official race photography.
This listing is for information only. Unbroken is not affiliated with, endorsed by, or sponsored by IRONMAN 70.3 Tallinn 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.
