Col du Chioula

What to Expect on the Col du Chioula

The Col du Chioula is a Category 1 climb in France that earns its classification honestly. At 9.4 km with an average gradient of 8.49% and a punishing maximum of 20.77%, this is not a climb that forgives poor pacing or optimistic gearing choices. The road gains 1,160 m of total ascent from a start elevation of 637 m to the summit at 1,435 m — a sustained, relentless effort throughout.

An average gradient of 8.49% over nearly 10 km puts this squarely in the territory where most riders will be deep in their FTP zone well before halfway. Factor in that the maximum gradient touches 20.77% and you have a climb with at least one section that will force even strong climbers to dig hard or grind to a near-halt.

Gradient Profile

The numbers tell a clear story:

• Length: 9.4 km
• Average gradient: 8.49%
• Maximum gradient: 20.77%
• Total ascent: 1,160 m
• Category: 1

A sustained average above 8% across 9.4 km leaves very little room for recovery. The gap between the average (8.49%) and the maximum (20.77%) — a spread of more than 12 percentage points — indicates the climb is not uniform. Expect the hardest sections to arrive as sharp ramps rather than a gradual build, which means the overall rhythm of the ascent can be deceptive. Sections that feel manageable will be interrupted by pitches that demand an immediate gear change or a sharp lift in effort.

Pacing Strategy

The core mistake on a climb like this is going out too hard on the lower, more moderate stretches. Given the 9.4 km length and the lurking 20.77% ramp somewhere above, treat the opening kilometres as a controlled effort:

• Start conservatively. Ride the early kilometres at a pace you could theoretically hold for 15–20 minutes, not 9. The category 1 rating reflects cumulative difficulty, not just peak steepness.
• Anticipate the ramps. Because the maximum gradient is significantly above the average, the steepest sections will feel dramatically harder than what came before. When the road tilts sharply, resist the urge to accelerate out of the saddle unnecessarily — settle, spin, and keep breathing controlled.
• Monitor your effort, not your speed. Speed drops sharply on gradients above 15%. Use power or perceived exertion rather than pace as your guide. If you don't have a power meter, use the FTP estimator to anchor your target effort zones before the ride.

Gearing Notes

With a maximum gradient of 20.77%, gearing is not something to improvise. If you are riding a compact chainset (50/34), you will want at least a 32t or 34t sprocket at the rear to have a usable cadence on the steepest sections. Riders on standard gearing (53/39) with a standard cassette topping out at 28t should expect to either push a harder gear at low cadence or risk blowing up before the summit.

The 1,160 m of total ascent also means legs will accumulate significant fatigue before you hit the hardest pitches. Arrive at the bottom with a gear you are not afraid to use immediately — there is no flat warm-up built into a climb that starts at 637 m and rises continuously to 1,435 m.

Summary

The Col du Chioula cycling climb is a genuine Category 1 test: long enough at 9.4 km to punish pacing errors, steep enough at 8.49% average to keep the pressure constant, and sharp enough at 20.77% maximum to catch out anyone who drifts into complacency. Prepare your gearing, set a conservative early pace, and conserve something for the ramps.