The Geelong Bike Leg: 90 km of Rolling Roads, Wind and a Hairpin You Can't Get Wrong

The big picture

The bike leg at IRONMAN 70.3 Geelong is 2 laps of 45 km with 412 m of official elevation gain. It's not a flat course, it's not a mountain course: it's rolling, a mix of fast sections in the aero position and segments where you need to manage your effort. Opinions differ: one local guide describes it as fast, a 2025 race report calls it "one of the most honest courses on the circuit", and several reports note the road surface isn't smooth everywhere. The truth is somewhere in between: it depends on the wind on the day.

The first few minutes: the hairpin and Eastern Park

Right after the mount line you hit a tight hairpin and a climb through Eastern Park. Every year you see athletes get on the bike in a big gear and grind to a halt. The rule is simple: shift into an easy gear BEFORE you rack your bike in transition. Go 2-3 cogs easier than what you'd use on the flat. You don't win the first 2 km, you survive them: cold legs, high adrenaline, athlete traffic.

The key segments

• Geelong-Port Arlington Road: wide lanes, smooth tarmac. This is where you stay aero and grind out the miles. The course gives back here, wind permitting.
• Point Henry: rougher surface near the industrial zone. It's not dangerous, but it vibrates. If you run bottles behind your saddle, check they're secure in training.
• "The climb": the steady climb towards Port Arlington before the turnaround at Curlewis Golf Club. It's not a nasty pinch, it's a rideable climb. The risk is doing it above threshold on lap one and paying for it on lap two.

Wind is the real variable

The sections along the bay are exposed and the crosswind can be strong. That changes two decisions:

1. Wheel depth: pick a depth you know you can handle in a 35-40 km/h crosswind. If you've never ridden a disc or a deep-section wheel in a crosswind, Geelong isn't the place to try it for the first time. 2. Pacing by segment: into a headwind, lift your watts slightly; with a tailwind, let it roll. The classic mistake is pushing hard with a tailwind (when it pays little) and backing off into a headwind (when it pays a lot).

Train specifically in crosswinds in the months beforehand: rides on open roads, hands low, shoulders relaxed.

Pacing over two laps

The 2-lap format is a gift: lap one is the recon, lap two is the race. Concrete plan:

• Lap one: 2-3% below your target power. Memorise where the wind hits, where the surface is rough, where you can push on.
• Lap two: at target, with the freedom to push in the final 15 km if your legs respond.

Remember the run is NOT flat and starts uphill: coming off the bike with cooked legs here costs you straight away, not after 10 km.

What to do now

• Choose your wheels based on the wind you know you can handle, not the wind you hope to find.
• Practise a standing start uphill in an easy gear: simulate the hairpin after the mount line.
• In the final 8 weeks, include at least 2 long rides on rolling terrain with pace changes, finishing with 15-20 minutes at race intensity.
• If you arrive a few days early, do a recon lap of the course: several local groups ride it regularly.