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IRONMAN 70.3 World Championship training plan: 2027 race guide

Chattanooga, United States28 August 2027 – 29 August 2027

Start trainingOfficial entry & details

Updated Oct 17, 2026 · Verified Oct 14, 2026

The race at a glance

Route and elevation

The current event overview: river swim, hilly bike and rolling run. Confirm the final edition-specific maps and athlete guide.

  • Swim environment: river.
  • Bike profile: hilly.
  • Run profile: rolling.

Race guide

Swim, bike and run preparation

The current event overview classifies the swim as river, the bike as hilly and the run as rolling. Practise sustainable climbing and safe descending on the bike; a flat-road speed target will not describe the climbing sections. The run also has elevation changes: pace by effort and protect your ability to run the later hills. These classifications do not confirm the final map, water conditions, wetsuit decision or aid layout. Use this event’s athlete guide for those details.

Race overview

IRONMAN 70.3 World Championship is listed by the organiser for Chattanooga, TN, United States. The currently published event date is 2027-08-28 to 2027-08-29. The event date and broad format were checked on October 14, 2026. Check the official entry page for current availability and eligibility.

The official event page describes the swim as River, the bike as Hilly, and the run as Rolling. These are useful planning signals, not a substitute for the current course map or athlete guide.

The organiser remains the reference for entry eligibility, exact start time, division or age-group rules, equipment, course changes, cutoffs and cancellation policies. Recheck the official event page before paying for travel and again when the current athlete guide is released.

Final official-source checklist

Within race week, reopen the official event page and confirm date, venue, start procedure, entry status, course, rules, equipment, cutoffs and emergency guidance. Keep the current athlete guide available offline if the organiser provides one.

Further reading

Training plan and timing

Compare the start dates below, then choose a plan that fits your current training and available time.

42 weeks and 4 days remain until the listed 28 August 2027 race day.

  1. Start27 February 2027
  2. Build26 weeks
  3. Taper2 weeks
  4. Race day28 August 2027

26-week plan option

Compare 3 other plan lengths
  • 16-week plan
    Start by 8 May 2027
  • 20-week plan
    Start by 10 April 2027
  • 24-week plan
    Start by 13 March 2027
View 26-week plansView 16-week plansView 20-week plansView 24-week plans

Need a printable plan? Download the IRONMAN 70.3 training plan PDF.

Race-day strategy

  • Keep bike effort controlled early, especially into wind or on climbs.
  • Use the bike to execute the fueling plan you rehearsed.
Open race calculators and tools
Loading 70.3 fueling planner…
IRONMAN time and split calculatorIRONMAN 70.3 fueling plannerTraining start-date calculatorIRONMAN 70.3 training plan PDF

Race-week logistics

Use the current organiser guide for schedules, transport, cutoffs, equipment, and other time-sensitive instructions.

Current details to confirm: start schedule, expo, bib pickup, transport, cutoffs, equipment rules, entry price.

Adaptive AI coach for iPhone

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Your adaptive AI coach builds around this finish line, follows the training you complete, and adjusts upcoming work around recovery, travel, missed sessions, and race week.

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FAQs

When is this race?

IRONMAN 70.3 World Championship is currently listed for 2027-08-28 through 2027-08-29. Recheck the official page before booking because event details can change.

Where is this race?

The official event page lists IRONMAN 70.3 World Championship in Chattanooga, TN, United States. Confirm the venue address and access instructions on the current event page.

How long should I train for this race?

Compare the 16, 20, 24, 26 week plans with your current consistency, weakest discipline or station, recovery and available runway. Do not compress missed weeks if a standard start date has passed.

What should I verify before entering this race?

Check the current date, entry status, eligibility, course or venue layout, equipment, cutoffs, cancellation terms and travel demands on the official organiser page.

Is the course information for this race final?

The swim, bike and run labels come from the current official directory. Use the event's latest course maps and athlete guide for final route, elevation, cutoff and transition decisions.

Can a calculator predict my race result?

No. Calculators organize assumptions. Weather, terrain, venue flow, transitions, nutrition, health, crowding and late-race fatigue can change the result.

How many weeks until this race?

The listed race date is 2027-08-28. Use the training start-date calculator for the number of weeks remaining today; select a plan only after checking that its opening workload fits your recent training.

What should I check for this edition?

The current event overview classifies the swim as river, the bike as hilly and the run as rolling. Practise sustainable climbing and safe descending on the bike; a flat-road speed target will not describe the climbing sections. The run also has elevation changes: pace by effort and protect your ability to run the later hills. These classifications do not confirm the final map, water conditions, wetsuit decision or aid layout. Use this event’s athlete guide for those details.

Keep going

IRONMAN 70.3 Race Calendar and Athlete Guides

Browse 101 official-source IRONMAN 70.3 events by date and place, then open athlete guides with training timelines, tools and verification notes.

Open guide

IRONMAN 70.3 Training Plans: 16–26 Weeks

Choose a 16–26 week IRONMAN 70.3 plan using swim, bike, run, brick, fueling, recovery and schedule readiness checks.

Open guide

Long-course triathlon research: pacing, fueling and readiness

Evidence-informed protocol: Long-course triathlon research: pacing, fueling and readiness. Practical steps, who it helps, and what to watch out for.

Open guide

Sources