The Augusta 70.3 Bike: One Loop, Six Punchy Climbs, and Pavement That Demands Respect

The Big Picture

The bike leg at IRONMAN 70.3 Augusta is a single 55.7-mile (89.6 km) loop. The official elevation gain is 1,970 ft, roughly 600 m. Heads up: other sources list anywhere from 1,248 to 2,118 ft, so take the absolute numbers with a grain of salt. The actual profile looks like this: the first 10 miles are flat heading out of town, then a rolling middle section with about six 3-5 minute climbs all packed in before mile 37, and finally 10 flat miles back to T2.

The course runs on rural roads south of Augusta: Gordon Highway, Mike Padgett Highway, Old Waynesboro Road, Liberty Church Road. Long straightaways broken up by a few technical turns. Wind is usually light, 6-7 mph out of the east: not a deciding factor, but still plan for where it might be a headwind on the way back.

How to Pace It

The classic mistake here is a double one. First: you exit the water with a time inflated by the Savannah River current and start the bike on an adrenaline high. Second: the climbs are short and tempt you to hammer because they "don't last long." Add it up: six 3-5 minute efforts above threshold in the first two hours, and the half marathon in hot, humid conditions turns into a death march.

A concrete plan:

• First 10 flat miles: stay below your power target. Settle in, drink, let the people who want to blow up ride away.
• Miles 10-37: set a clear ceiling on the climbs (for most age-groupers: no more than 105-110% of race power target, never in VO2). Recover on the descents and ease back on the gas smoothly.
• Last 10 flat miles: this is where time is made. If you've paced well, you can go back to full target power and prep your legs for the run by spinning an easier gear over the last 2-3 km.

In training, replicate the demand: 3-5 minute blocks slightly above threshold inside long race-pace rides, followed by a brick run. It's the most course-specific workout you can do.

Pavement and Equipment

The asphalt is rough in spots: potholes and construction zones have shown up in race reports, and in 2025 one athlete lost their bottle cages on a beat-up section. What to do:

• Check the torque on rear-mounted bottle cages, gel holders, and accessories before bike check-in.
• Don't pump to the max: slightly lower pressures than your usual ceiling give you comfort and grip over rough sections.
• Carry a full flat kit and know how to use it: you're on rural roads and support can take a while.

Gearing and Position

With 3-5 minute climbs at manageable grades you don't need mountain gearing, but an 11-30 or similar lets you stay seated and spin up the kickers instead of mashing out of the saddle. The long straights reward the aero position: if you can't hold your position for 2.5 hours or more, work on that now, not in September.

What to Do This Week

1. Lock in your race power/RPE target and your ceiling for the climbs. 2. Schedule 3-4 rides with 6 x 4-minute blocks above threshold. 3. Shake down your bike on rough roads: if something rattles or comes loose in training, it will come off at Augusta.

The swim gives you minutes. The bike is where you defend them or throw them away. Decide which race you want to ride before you start.