IRONMAN 70.3 Augusta Course Profile

Swim

Downriver swim

Minimal friction. Focus on sighting and group dynamics.

A quick river swim can improve confidence, but verify current and safety guidance in the athlete guide.

Bike

Rural bike

5% speed penalty. Use VI discipline — avoid surging over short climbs.

Rural roads require steady pacing and attention to surface, turns, and aid timing.

Run

Flat shaded run

Neutral modifier. Focus on cadence, fueling, and pacing discipline.

Flat shade helps, but heat and humidity can still require a slower first half.

Wetsuit

This profile uses a wetsuit-friendly planning assumption. WetsuitWetsuitNeoprene suit worn during the swim for buoyancy, insulation, and hydrodynamics. Legal when water temperature is below a race-specific threshold. use can improve buoyancy and reduce swim cost, but the actual effect varies by athlete, fit, water temperature, and race rules.

Official water-temperature readings and race-day rules override any historical assumption.

Tire recommendation

Lightweight clinchers / tubeless

Rolling terrain needs low weight for short climbs and reliable cornering on descents. Tubeless setup reduces puncture risk on variable road surfaces.

Cutoff pressure

The swim and run profile can help, but humidity and bike pacing still determine the final buffer.

Best use

Do not let a quick swim make the bike aggressive; the best Augusta plans respect late-race heat risk.