70.3

IRONMAN 70.3 Augusta

Sunday, 27 September 2026

IRONMAN 70.3 Augusta blends a ~1.9 km freshwater swim with a rolling 89.8 km bike (456 m gain) and a rolling 21.1 km run (91 m gain) where hot conditions and an easterly wind mean hydration and pacing are everything.

· 39 days to go
Air
19–29°
typical
Wind
4.4 E
prevailing
Water
typical — confirm
Bike climb
+456 m
Fueling — per hour
typical conditions
90 g
carbs
1000 mg
sodium
+250 mg vs typical
825 ml
fluid
+175 ml vs typical
  • 💧 Plan fluids toward 825 ml/h (cap near 1–1.2 L/h and let thirst be the ceiling). It typically runs hot through the afternoon.
  • 🧂 Lift sodium to ~1000 mg/h.
  • 🍚 Keep carbs at 90 g/h — don't add more in the heat, and keep your drink mix dilute so fluid still empties fast.
  • ⏱️ Sodium preload: ~500–750 ml with ~1,000 mg sodium, 60–90 min before the start.
Based on 10-year typical conditions (~29°). 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 — slots TBAsee who qualified →
0 km45 km90 km126 m
89.8 km · +456 m climbing
T1 — swim to bike

Transition 1 should be efficient: dry off quickly where needed, put on helmet and glasses, and confirm your bike computer/gear selection before you fully commit. The first 5–10 minutes off the swim are about establishing control—smooth power, watch your heart rate, and get your fueling mechanism running early so you don’t play catch-up later. Because this course is rolling, set expectations mentally: you’ll feel frequent changes, so don’t chase power on every rise—stay patient over the undulations.

During the bike

The bike is 89.8 km with 456 m of rolling elevation, so expect repeated up-and-down efforts rather than one sustained climb. With hot conditions and an easterly wind (4.4 m/s from the E), you’ll likely feel wind effect more as you change direction and as exposed sections open up—use it to regulate effort instead of forcing speed. Your fueling target is 90 g carbs per hour with 1000 mg sodium and 800 ml fluid per hour, and you’ll want to start early enough that you’re hitting the rate consistently rather than late in the ride. Drink consistently even if you don’t feel thirsty; with heat and wind, sweat loss and electrolyte needs can rise faster than you think. Keep nutrition accessible and predictable: take carbs/sodium with your planned bottle schedule, and aim for steady power on the rollers so your run legs aren’t compromised.

Closing notes

The best bike finish is “controlled steady”: hit your carbs/sodium/fluid rate, stay patient on the rolls, and let the wind shape effort rather than dictate it.

Results by year

Every edition of this race in our database. The course and conditions can shift year to year — see who qualified and the World Championship slot rolldown for each.

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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.