Col du Cucheron

What to Expect on Col du Cucheron

Col du Cucheron is a category 2 climb in France that earns its rating through consistency rather than sheer length. At 7 km from base to summit, it is not an all-day grind, but the 7.36% average gradient means there is no flat recovery anywhere on the road. Starting at 638 m elevation, the climb accumulates 709 m of total ascent to reach the summit at 1,152 m, a net elevation gain of 514 m.

The number that demands your attention before you even clip in: a maximum gradient of 38.12%. That figure is extreme — steeper than many riders will ever encounter — and it signals that the climb is not uniform. The average of 7.36% is being pulled upward by at least one brutal ramp that bears no resemblance to what surrounds it.

How the Gradient Unfolds

With a 7.36% mean across 7 km and a 38.12% ceiling, the profile almost certainly contains a mix of moderate pitches and at least one section that most riders will need to treat as a short, all-out effort or, depending on gearing, a very slow grind.

• Lower slopes: Expect the road to settle into a rhythm that feels consistent with the overall average. This is where pacing discipline matters most — the temptation to push hard early on a 7 km climb is real, but the ramp ahead will extract a heavy cost from anyone already deep in their FTP zone.
• The maximum ramp: At 38.12%, forward momentum becomes the primary challenge. Cadence will drop sharply regardless of gearing. Treat this section as a micro-effort: accept the speed loss, keep the pedal stroke smooth, and do not panic into a standing sprint that blows up your legs for the remainder of the climb.
• Upper slopes: After clearing the steepest pitch, resist the urge to immediately hammer back up to tempo. Allow 30–60 seconds of controlled effort before rebuilding pace toward the summit.

Pacing Notes

A 7 km climb at 7.36% average sits in a duration range — roughly 25 to 40 minutes for most trained cyclists — where steady-state pacing around threshold is theoretically optimal. The 38.12% spike breaks that model. Plan for a structured effort:

1. Ride the opening kilometres at 90–95% of threshold.
2. Drop expectations completely on the maximum ramp — survival and smooth technique over power output.
3. Rebuild to 90–95% for the final kilometres once the ramp is behind you.

If you are unsure of your current threshold power, the FTP estimator can give you a working number before you attempt this climb.

Gearing Considerations

The 38.12% maximum gradient is the deciding factor here. A standard compact chainset (50/34) paired with an 11-28 cassette will leave most riders in serious trouble on that pitch. At minimum, target a 32 or 34-tooth largest sprocket. Riders who prefer to stay seated through technical ramps should consider a 36-tooth cassette or equivalent. There is no shame in over-gearing for a climb with this kind of maximum — running out of gears at 38% is a fast way to stall or unclip.

Summary

Col du Cucheron is a category 2 climb that rewards disciplined pacing and punishes complacency. The 7.36% average is manageable; the 38.12% maximum is not. Prepare your gearing, plan your effort around the ramp, and treat the 709 m of total ascent with the respect it deserves.