Col de Soudet

What Kind of Climb Is Col de Soudet?

Col de Soudet is an HC-category climb in France that earns its hardest rating through a combination of sustained gradient and punishing spikes. At 12.3 km from base to summit, with 1,443 m of total ascent and an average gradient of 8.48%, it sits in the upper tier of Pyrenean difficulty. The road climbs from 491 m at the start to 1,531 m at the summit — a raw elevation gain that leaves little room for recovery if you mismanage your effort early on.

How the Gradient Unfolds

The 8.48% average is honest but incomplete. A climb that averages this steep over 12+ km is already demanding; the presence of a 22.41% maximum gradient means the road is not consistent — it spikes hard in sections, likely forcing significant changes in speed and power output.

Typical Profile Behaviour at This Grade

• Lower flanks: Expect the opening kilometres to establish the tempo. An average this high over this distance rarely starts gently — there is no extended flat run-in to use as a warmup.
• Mid-section: The gradient likely fluctuates between demanding and severe. Sections approaching double figures will feel like respite only relative to what comes before or after.
• Upper ramps: At least one section reaches 22.41%. At that gradient, forward momentum nearly stops for most riders. Seated climbing becomes very difficult; standing and grinding is often the only option.

Pacing Notes

With 1,443 m of ascent compressed into 12.3 km, this is not a climb you can pace by feel and expect to summit well. A few hard rules apply:

Start conservatively. The temptation to push hard on any early shallower sections should be resisted. At 8.48% average, there are no genuinely easy sections — anything that feels comfortable is probably borrowing from your reserves.

Target a sustainable power output. Riders who know their FTP should aim to hold a realistic percentage of it for the full duration rather than chasing pace. If you haven't tested recently, the FTP estimator gives a working baseline before you commit to a number.

Gear selection matters more than on most climbs. The 22.41% maximum gradient is steep enough to make under-gearing a serious problem. If your lowest gear ratio forces you to muscle through that section rather than spin, the damage to your legs will carry forward to the final kilometres. A compact chainset with a wide-range cassette (32t or larger on the rear) is strongly advisable.

Anticipate the severe ramps. When gradient spikes to 22%, shift down before you hit the wall rather than during it. Mid-ramp gear changes under load stress the drivetrain and can interrupt rhythm catastrophically.

Effort Management Over 12.3 km

At this length and average gradient, Col de Soudet falls into the category of climbs where pacing strategy is the primary determinant of a clean summit versus a blown-up final third. Riders who start at threshold and hold it often find the upper third survivable. Riders who open above threshold — even briefly on early ramps — typically pay a disproportionate cost later.

If you are approaching this climb for the first time, treating it as two halves is useful: hold something back through kilometre six, then assess what you have left. The HC category is there for a reason. Respect the numbers.