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Triathlon Atlas
A straight empty road crossing flat farmland to the horizon

Course profile

Flat triathlon courses: bike and run both labelled flat

49 races of 159 carry a flat label on the bike and on the run: 10 full distance, 35 half distance and 4 short course. Read on 22 September 2026.

See them in the finder

Method

What the flat label is

The organiser gives each bike and run course one of three words: flat, rolling or hilly. This page keeps the races where both words are flat. The label is the organiser's own description, and no published rule says how much climbing a flat course may contain.

Only 10 races publish a bike elevation figure, and 2 of them carry the flat label. IRONMAN Calella-Barcelona is one: its bike course is labelled flat and its course page states about 750 m of elevation gain over 180 km. Treat the label as a description of the terrain's character and look for a figure when one exists.

A flat coastal road beside dunes and sea grass

Every race with a flat bike and a flat run

Recomputed from the records held here. Narrow it by month, region or water.

49

races, all of them

Distance
Month
Region
Country
Swim venue
Water temperature

14 °C is the coldest average published, 29 °C the warmest.

Full distance 10 Half distance 35 Short course 4
RaceDateCountryDistanceSwimWaterBikeRunEntries
IRONMAN 70.3 New York Jones Beach26 Sept 2026USHalf distanceBay18 °C Flat FlatOpen
IRONMAN Calella-Barcelona Calella4 Oct 2026ESFull distanceOcean23 °C Flat FlatOpen
5150 Coquimbo Coquimbo4 Oct 2026CLShort courseOcean15 °C Flat FlatOpen
IRONMAN California Sacramento18 Oct 2026USFull distanceRiver17 °C Flat FlatOpen
IRONMAN 70.3 Florianopolis Florianopolis18 Oct 2026BRHalf distanceOcean22 °C Flat FlatOpen
IRONMAN 70.3 Málaga Málaga18 Oct 2026ESHalf distanceOcean20 °C Flat FlatOpen
5150 San Juan San Juan30 Oct 2026ARShort courseReservoir22 °C Flat FlatOpen
IRONMAN 70.3 Kenting Kenting1 Nov 2026TWHalf distanceOcean25 °C Flat FlatOpen
IRONMAN 70.3 Türkiye Belek1 Nov 2026TRHalf distanceOcean25 °C Flat FlatOpen
IRONMAN Florida Panama City Beach7 Nov 2026USFull distanceOcean22 °C Flat FlatOpen
IRONMAN 70.3 Melbourne St. Kilda8 Nov 2026AUHalf distanceBay18 °C Flat FlatOpen
IRONMAN 70.3 Campeche Campeche8 Nov 2026MXHalf distanceOcean27 °C Flat FlatOpen
IRONMAN 70.3 Phu Quoc Phu Quoc15 Nov 2026VNHalf distanceOcean29 °C Flat FlatOpen
IRONMAN Cozumel Cozumel22 Nov 2026MXFull distanceOcean26 °C Flat FlatOpen
IRONMAN 70.3 Cartagena Cartagena29 Nov 2026COHalf distanceBay29 °C Flat FlatOpen
IRONMAN 70.3 Valdivia Valdivia29 Nov 2026CLHalf distanceRiver16 °C Flat FlatOpen
IRONMAN 70.3 Aracaju-Sergipe Aracaju29 Nov 2026BRHalf distanceRiver26 °C Flat FlatOpen
IRONMAN 70.3 Western Australia Busselton6 Dec 2026AUHalf distanceBay19 °C Flat FlatOpen
IRONMAN Western Australia Busselton6 Dec 2026AUFull distanceBay21 °C Flat FlatOpen
IRONMAN 70.3 La Quinta La Quinta6 Dec 2026USHalf distanceLake14 °C Flat FlatOpen
IRONMAN 70.3 Veracruz Veracruz6 Dec 2026MXHalf distanceOcean25 °C Flat FlatOpen
IRONMAN 70.3 Bahrain Manama11 Dec 2026BHHalf distanceBay23 °C Flat FlatOpen
IRONMAN 70.3 Panama Panama City28 Feb 2027PAHalf distanceOcean26 °C Flat FlatOpen
IRONMAN 70.3 Doha Doha20 Mar 2027QAHalf distanceSea23 °C Flat FlatOpen
IRONMAN 70.3 Texas Galveston Island4 Apr 2027USHalf distanceBay22 °C Flat FlatOpen
IRONMAN 70.3 San Juan San Juan11 Apr 2027ARHalf distanceReservoir20 °C Flat FlatOpen
IRONMAN 70.3 Brasilia 18 Apr 2027BRHalf distanceLakenot published Flat FlatOpen
IRONMAN 70.3 Venice-Jesolo Jesolo24 Apr 2027ITHalf distanceOcean17 °C Flat FlatOpen
IRONMAN 70.3 Peru Lima25 Apr 2027PEHalf distanceOcean21 °C Flat FlatOpen
IRONMAN 70.3 Western Sydney Penrith2 May 2027AUHalf distanceLake19 °C Flat FlatOpen

Read from the organiser’s own pages on 22 Sept 2026

Full distance

The 10 flat full-distance races

At full distance a flat course removes the climbing from 180 km on the bike and 42.2 km on the run, which makes pacing more predictable over a very long day. The 10 races with both labels flat are IRONMAN Calella-Barcelona, IRONMAN California, IRONMAN Florida, IRONMAN Cozumel, IRONMAN Western Australia, IRONMAN Vietnam, IRONMAN Brazil, IRONMAN Kalmar-Sweden, IRONMAN Belgium Knokke-Heist, IRONMAN Italy Emilia Romagna.

Several of them are coastal. On an exposed coast the wind decides the bike split more than the terrain does, and the course labels say nothing about wind.

A flat seafront road along a calm sea, palm trees bent by the wind

Side by side

Compare flat courses on the rest of the data

Two flat courses can differ on month, water and air temperature. Put them on the same rows.

FieldNo race selectedNo race selectedNo race selected
Distancenot publishednot publishednot published
Datenot publishednot publishednot published
Countrynot publishednot publishednot published
Registrationnot publishednot publishednot published
Swim venuenot publishednot publishednot published
Average water temperaturenot publishednot publishednot published
High air temperaturenot publishednot publishednot published
Low air temperaturenot publishednot publishednot published
Bike profilenot publishednot publishednot published
Bike elevation gainnot publishednot publishednot published
Run profilenot publishednot publishednot published
Run elevation gainnot publishednot publishednot published
Overall cut-offnot publishednot publishednot published
World championship slotsnot publishednot publishednot published
Altitudenot publishednot publishednot published
First editionnot publishednot publishednot published
Swim startnot publishednot publishednot published

Rows marked “not published” are fields no source publishes for these races. No score is computed from the rows above: a single number would hide which of them decided it. Figures read on 22 Sept 2026.

Limits

What a flat label leaves out

Heat is the first thing it leaves out. The median published high air temperature is 26 °C across the flat races and 26 °C across all races, so choosing flat does not move you towards cooler days.

Wind is the second, and road surface the third, and neither is published as a field. A flat course also keeps you in the same position on the bike for the whole leg, which some athletes find harder on the back and neck than a course with climbs to break it up.

An exposed flat road through marshland under a heavy sky

Coverage

The fields behind this page

Counted from the records held here, read on 22 September 2026.

Not published anywhere

World championship slots
On a separate page per race, and it changes every year.
Altitude
Not published. It can be derived from the coordinates, and is not yet.
First edition
Not published by the organiser.

Counted from this site’s own records, read on 22 Sept 2026.

Questions this page is asked

Is a flat course faster?

On the same day and in the same conditions, a course with less climbing usually gives a faster bike split. Conditions are rarely the same from one race to another, and this site holds no finishing times to compare.

Why do some flat courses publish hundreds of metres of climbing?

Because the label describes the character of the course over its whole length. 750 m spread over 180 km is a gentle average, and the organiser still calls that course flat.

Where is the flattest course?

Only a figure could answer that, and only 10 races publish one. Among them the lowest is IRONMAN 70.3 Eagleman, at about 101 m on the bike.

Are short-course races included?

Yes, the 4 short-course races with both labels flat appear in the list. Tick a distance in the finder to leave them out.

Next step

Cross the flat label with the rest

Month, region and water, in the same finder, starting from the flat courses.

Open the finder on flat coursesCompare a shortlist
A rural road lined with poplars at dawn, mist over the fields