May 17, 2026 · Chattanooga, Tennessee, USA
70.3 mi (113 km)Triathlon70.3 / Half
Ironman 70.3 Chattanooga
River City. Downstream.
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Terrain
Tennessee River downstream swim (significant current assist). Rolling bike through Georgia and Tennessee farm roads. Flat run on the Riverwalk and bridge.
Conditions
May in Chattanooga: 68–84°F with Southern humidity building by midday. Can be warm to hot on the run.
Aid Stations
Four bike aid stations; run aid every mile. Strong Chattanooga local support.
Key Challenge
The downstream swim is significantly faster than any pool or lake swim — athletes exit earlier than expected, often underfueled going into T1.
Nutrition answers for Ironman 70.3 Chattanooga.
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What carb targets for Chattanooga 70.3?
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Any Chattanooga-specific nutrition tips?
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