The Bike Leg at Aix-en-Provence: 90 Mixed Kilometers to Manage, Not Attack

The Course in Brief

The bike leg at 70.3 Aix-en-Provence is a point-to-point: you exit the water at Lake Peyrolles and arrive in Aix-en-Provence after 90 km through Provençal scenery and the roads around the Montagne Sainte-Victoire. The course info lists roughly 1,000 m of climbing, but that figure isn't verified in available sources: treat it as indicative. What's clear from the course descriptions is its character: a mix of flat and rolling sections, with some technical stretches. The current reference is the 2026 edition: check the official 2027 map as soon as it's released and recalibrate your numbers off that.

Where the Race Is Decided

On a mixed course like this, you don't gain time on the climbs: you lose it. Short climbs with punchy accelerations tempt you to push above threshold, and every surge paid for at high watts comes back to bite you on the run. The practical rule: hold your plan's target power and accept that speed drops on the climbs. If you're chasing sub 5:00, the reference table says 2:40 on the bike, roughly 33-34 km/h average: on a rolling course you only get there if you make the fast sections genuinely fast—meaning you crest the climbs with legs ready to accelerate, not gasping for air.

Descents and Technical Sections

The roads in the Sainte-Victoire area alternate flat and rolling terrain and include technical sections. Descending is free time, but only if you know how to handle your bike: clean lines, brake before the corner, eyes up the road. If descending isn't your strength, don't improvise on race day: in the weeks before, schedule specific rides on similar descents, ideally with variable road surfaces. A minute lost descending out of caution is worth less than a crash, but two minutes lost to poor technique is trainable.

The Wind: The Factor You Don't Control

May in Provence means the mistral is possible. Wind can completely change the value of the flat sections: a fast straight into a headwind becomes the hardest part of your day. Check the forecast in the days before and mentally prepare for two scenarios: a fast race with a tailwind or neutral conditions, or a race of management with the mistral. In the second case, lower your expectations for the bike split and protect the run: into the wind, stay low on the aerobars and hold power, not speed.

Gearing and Setup

With an indicative 1,000 m of climbing over 90 km, a compact or semi-compact chainring with generous cassettes (at least a 28, better a 30-32 for high-cadence riders) is a sensible choice. A TT bike with aerobars remains the right call for most age-groupers: there's plenty of flat, fast terrain. But test your setup on rolling courses before the race: if you can't accelerate from the aerobars on the short climbs, work on it in training.

What to Do Between Now and Race Day

• Key test: a 90 km ride with roughly 1,000 m of climbing at race power, followed by a 20-30 minute run at race pace. If the run afterward is a disaster, your bike plan is too aggressive.
• Equipment decision: lock in gearing and wheels at least a month out from the race and don't change them again.
• Wind plan B: set a "mistral version" bike split now (10-15 minutes slower) so on race day you're not chasing impossible numbers.
• Official map: as soon as the 2027 version is published, verify the actual elevation gain and where the climbs sit, and update your pacing accordingly.