70.3New for 2026

IRONMAN 70.3 Versailles

Sunday, 11 October 2026

IRONMAN 70.3 Versailles is a 1.9K freshwater swim, an 88.2K rolling bike with 619m of gain, and a 21.2K rolling run—expect moderate heat and a steady SW wind to shape pacing and fueling.

· 7 days to go
Air
10–18°
typical
Wind
4.9 SW
prevailing
Water
—
typical — confirm
Bike climb
+619 m
Race-day forecast — 7 days outupdated 6h ago
7–16°
temp
18 km/h
wind SW
31%
rain chance
0.5 mm
rain total
05:00
⛅
8°
11 W
☂ 9%
06:00
⛅
8°
11 W
☂ 8%
07:00
⛅
7°
10 W
☂ 8%
08:00
⛅
8°
10 W
☂ 8%
09:00
⛅
9°
12 W
☂ 8%
10:00
⛅
10°
16 W
☂ 8%
11:00
⛅
11°
18 W
☂ 8%
12:00
☁️
12°
17 W
☂ 12%
13:00
☁️
14°
16 SW
☂ 17%
14:00
☁️
15°
16 SW
☂ 22%
15:00
☁️
16°
15 S
☂ 28%
16:00
☁️
16°
15 S
☂ 29%
17:00
☁️
16°
14 S
☂ 30%
18:00
☁️
15°
14 S
☂ 31%
19:00
☁️
15°
13 S
☂ 31%
20:00
☁️
15°
13 S
☂ 31%
21:00
🌦️
15°
14 SW
☂ 31%
Sunrise 08:05 · Sunset 19:10 · UV max 3 · gusts to 35 km/h
Actual forecast for this race date — refreshed daily as it approaches. The chips above are the 10-year typical.
Fueling — per hour
forecast firming up · 7 days out
90 g
carbs
700 mg
sodium
-50 mg vs typical
600 ml
fluid
-50 ml vs typical
  • 👍 Conditions are kind — the 600 ml/h fluid, 700 mg/h sodium and 90 g/h carbs baseline should hold. Fine-tune to your own thirst and sweat rate.
Build your fuel plan — which gels, how many per hourFuel tool →
Based on the race-day forecast (feels-like up to ~11°) — sharpens as the race nears. Baseline for a ~5.5 h finish, 70 kg athlete. Scale to your own body mass and sweat rate.

Typical 10-year conditions, not a forecast. Water temperature and the wetsuit ruling are set on race morning — check the IRONMAN race guide →

Worlds qualification — 60 slots at this racesee who qualified →
0 km44 km88 km178 m
88.2 km · +619 m climbing
T1 — swim to bike

Run smart through T1: re-check your hydration position, secure helmet and eyewear before moving away from the line, and spend a few seconds getting cadence and gearing settled. The first minutes are about finding your rolling-rhythm—don’t let the excitement of a fast start override the need to match power to a course with 619m of elevation gain. If you’re near others, pass decisively but smoothly so you can lock in your line and breathing early.

During the bike

The 88.2K bike is rolling with 619m of gain, so pacing should be “steady up, composed down.” With wind from the SW at about 4.9 m/s, you’ll likely feel cross/tail/headwind changes across different segments—stay calm when the wind hits and keep your steering inputs smooth on any gustier stretches. Plan to ride with a strong aerobic focus on climbs without spiking effort; on descents, prioritize stability and staying on your intended cadence rather than chasing speed. Fuel and hydration should be consistent: target about 90g carbs per hour, 600mg sodium per hour, and ~500ml fluid per hour—start early enough that you’re not behind halfway through the bike, and adjust fluid slightly if conditions feel cooler or you sweat less.

Closing notes

Roll the elevation—ride the climbs like a repeatable effort and the descents like controlled execution, while keeping carbs/sodium on schedule.

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Weather is a 10-year climatology (typical, not a forecast). Course tracks are approximate, derived for planning — verify against the official course. Maps © OpenStreetMap. Not affiliated with or endorsed by the IRONMAN Group.