Triathlon Distances: From Sprint to Ironman
A triathlon is a single race with three back-to-back disciplines — swim, bike, run — separated by two transitions (T1 and T2). Beyond that one definition, triathlon splits into five standard race formats that scale from a 13 km weekend sprint to the 226 km full IRONMAN. This page explains every distance, shows how long each takes to finish, and helps you pick the right one for where you are right now.
Compare all five distances
The chart below scales every format by total distance and shows expected finish times. Toggle gender, skill level, age group, and units to see the time you should realistically target.
Triathlon Distances Compared
All five standard triathlon formats with expected finish times by gender, skill level, and age group.
Bar widths use square-root scaling so smaller formats remain comparable alongside the Ironman.
The five standard triathlon formats
Super Sprint
The entry-level format used for try-a-tri events, kids' races, and Mixed Team Relay at the Olympics. Lowest-risk way to test whether you enjoy the sport without committing to months of training.
Sprint
The most popular "first triathlon" distance worldwide. 4–6 hours per week for 8–12 weeks gets a reasonably fit runner or cyclist ready. Also the format of ITU World Cups and the fastest draft-legal racing on the planet.
8-week beginner plan →Olympic (Standard)
The distance that debuted at Sydney 2000. This is where training load (7–10 hours/week) starts to feel real, the bike leg finally matters, and pacing becomes a skill.
10-week beginner plan →IRONMAN 70.3 (Half Ironman)
"70.3" is the total distance in miles. This is where endurance takes over from speed: nutrition on the bike becomes non-negotiable, and the run is a half marathon off a 90 km ride. The smartest stepping stone to full IRONMAN.
12-week beginner plan →Full IRONMAN (140.6)
"140.6" is the distance in miles. 10–20 hours/week for 24–36 weeks. The race itself is a case study in nutrition, pacing, and mental resilience more than raw fitness. The flagship distance that put the sport on the map.
My first IRONMAN journey →Distances side by side
| Format | Swim | Bike | Run | Total |
|---|---|---|---|---|
| Super Sprint | 400 m | 10 km | 2.5 km | 12.9 km |
| Sprint | 750 m | 20 km | 5 km | 25.75 km |
| Olympic | 1.5 km | 40 km | 10 km | 51.5 km |
| IRONMAN 70.3 | 1.9 km | 90 km | 21.1 km | 113 km |
| Full IRONMAN | 3.8 km | 180 km | 42.2 km | 226 km |
Which distance should you pick?
The honest answer: whichever one you'll actually finish. Most experienced coaches recommend a ladder — Sprint in year one, Olympic in year two, 70.3 in year three, full IRONMAN when life logistics (and your knees) can absorb 15-hour training weeks. Skipping rungs is possible but expensive: rushed first-timers are the ones who DNF at the run.
- Zero endurance background? Super Sprint or Sprint. Eight weeks is enough.
- Marathon or HYROX background, no open water? Olympic. The bike and the swim learning curve are the real work.
- Comfortable with open water + 4-hour bike rides? IRONMAN 70.3.
- Already raced 70.3 in under 6 hours? Full IRONMAN is a 6–9 month commitment from that base.
My journey: marathon runner to first IRONMAN
After years of marathon running and HYROX racing, I'm doing my first full IRONMAN at Challenge Roth 2026 on July 6. I'm documenting everything — the training weeks, the mistakes, the gear decisions, the nutrition experiments — so that someone coming from a similar background doesn't have to figure it out alone.
→ Follow the full journey: Marathon runner to IRONMAN finisher
Upcoming triathlon races
Race guides for the biggest triathlons on the 2026 calendar — course breakdown, training tips, travel logistics, and what to expect on the day.
Frequently asked questions
What is the shortest triathlon distance?
Super Sprint is the shortest standard format: 400 m swim, 10 km bike, 2.5 km run — roughly 13 km total. Some local race series run even shorter "try-a-tri" events.
How long is a full IRONMAN?
A full IRONMAN is 140.6 miles (226 km) total: 3.8 km swim, 180 km bike, and a full 42.2 km marathon run. The race cutoff at most branded IRONMAN events is 17 hours from your swim start.
What does "70.3" mean in triathlon?
70.3 is the total race distance in miles — 70.3 miles ≈ 113 km. It breaks down as 1.9 km swim, 90 km bike, and 21.1 km (half marathon) run. It's called "Half Ironman" because it's exactly half of 140.6.
Is Olympic-distance triathlon the same as standard?
Yes. "Olympic" and "Standard" ("M distance" in French and German) are the same 1.5/40/10 km format. The name varies by federation; the distances don't.
What's a realistic first triathlon finish time?
For a first Sprint triathlon, most beginners finish in 1:30–1:45. For Olympic, plan for 2:45–3:30. For a first 70.3, 6:00–7:30 is normal. Use the interactive chart above to see the numbers by skill level and age group.
Can I skip straight to IRONMAN without doing a Sprint first?
Physically yes, practically no. The Sprint and Olympic races teach you transitions, open-water swimming, race nutrition, and pacing — all of which are expensive to learn for the first time on the clock in a 12-hour race. Every coach I've spoken to recommends at least one shorter race before committing to full distance.