Col de la Croix Perrin

Overview

Col de la Croix Perrin sits in the French mountains as a Category 3 climb — modest on paper, deceptive in practice. The headline numbers are 8.7 km at an average gradient of 3.96%, producing a net elevation gain of 345 m from a start elevation of 886 m to a summit at 1,231 m. That average, however, is a poor guide to what legs actually experience on the road.

What the Average Hides

The gap between average and maximum gradient is the defining characteristic here. A 3.96% mean alongside a 13.92% maximum means the road is not uniformly shallow — it concentrates difficulty into sharp, punchy ramps. The total ascent figure of 732 m against a net gain of only 345 m confirms this: the climb includes significant undulation or false-flat recovery sections that reset the legs before the gradient bites again.

Riders who treat Col de la Croix Perrin as a steady tempo effort will be caught off-guard when the road tilts past double digits. Near 14%, the gradient demands a genuine out-of-the-saddle effort or a very compact gear ratio.

Gradient Breakdown

Without kilometre-by-kilometre gradient data, the key tactical reference points are:

• Start elevation: 886 m — already elevated, so air density begins to thin slightly
• Net gain: 345 m across 8.7 km, yielding that 3.96% mean
• Total ascent: 732 m — roughly double the net gain, confirming notable up-and-down terrain
• Maximum ramp: 13.92% — treat this as the climb's crux; it will appear without warning if you are not familiar with the road

Pacing Notes

Because the total ascent (732 m) is so much larger than the net gain (345 m), pacing purely to FTP on the ascent sections will cause you to overcook efforts before the hardest ramps arrive. A conservative approach on the early or gentler sections — holding perhaps 85–90% of threshold rather than going full gas — preserves reserves for the 13.92% pitch.

Use a FTP estimator to set a realistic power ceiling before attempting the climb at race pace.

Gearing Recommendations

• A 34×28 or 34×32 compact setup is advisable for riders who are not specifically targeting a fast time
• The 13.92% maximum will demand your lowest gear if you are already fatigued from the undulating sections
• Riders on 2×11 mid-compact (36-tooth inner) should be comfortable on the gentler stretches but may spin out of range on the steepest pitches if cadence drops

Descent

The same undulation that breaks up the climb on the way up means the descent is not a straightforward, consistent drop. Expect alternating fast open sections and tighter, slower segments. Stay off the brakes early into blind corners until the road profile is familiar.

Category Context

At Category 3, Col de la Croix Perrin is firmly in training-ride territory for experienced climbers, but the irregular gradient pattern makes it a useful tool for threshold intervals with forced variation — the undulating profile naturally creates high-load and partial-recovery segments within a single effort. It is harder than a simple Category 3 label implies if ridden hard from bottom to top.