col de Guéry

Overview

Col de Guéry is a category 3 climb in France, running 7.8 km from a start elevation of 962 m to a summit at 1275 m. Over that distance you take on 313 m of net elevation gain, which is what puts the average gradient at a moderate 4.03%. On paper that number reads as a steady, manageable grind.

The paper number lies. The total ascent over the climb is 549 m, not 313 m. That 236 m difference is undulation: sections where the road dips or levels before climbing again, meaning you gain and give back height along the way. Every metre you descend has to be reclaimed, so the real climbing effort is closer to the total ascent figure than to the net gain. Expect the road to break rhythm rather than settle into one long, even grade.

How the Gradient Unfolds

A 4.03% average across 7.8 km tells you almost nothing about how the climb actually feels. With a maximum gradient of 12.87%, the steep pitches are more than triple the average, which means long stretches must sit well below 4% to balance them out. This is a climb of contrasts, not a constant.

• Flatter and recovery sections where the road eases off or dips, dragging the average down
• Repeated short climbs stacked back to back, the source of that 236 m of extra ascent
• A steepest ramp touching 12.87%, where you shift down and ride the pitch rather than fight it

Pacing Notes

On a smooth, even climb you can hold near-constant power and let speed take care of itself. Guéry's undulation makes that harder: on the flatter dips your speed climbs, and it is tempting to freewheel or push over the top of each rise. Resist surging into the steep ramps. Aim for even effort, not even speed, keeping your output anchored to your sustainable power output rather than chasing a target pace that the terrain keeps changing.

If you do not know your ceiling, run the numbers through the FTP estimator before you go. Knowing that figure lets you sit just under it on the 12.87% ramp and recover on the flatter sections without blowing the whole climb.

Gearing

Gearing is governed by the steepest gradient, and 12.87% is steep enough to demand a low bailout gear. Run a compact (50/34) or sub-compact chainset paired with a wide-range cassette so you can keep cadence up on the ramp instead of grinding. A 34×32 or 34×34 combination gives most riders enough range to spin through the steepest pitch. Check your setup before the ride: confirm the cassette and chainring you are actually running, not the one you think is fitted.

Summary

• Length: 7.8 km
• Average gradient: 4.03%
• Maximum gradient: 12.87%
• Net elevation gain: 313 m
• Total ascent: 549 m
• Category: 3

Col de Guéry rewards riders who read past the 4.03% average. Pace to effort, gear for the 12.87% ramp, and treat the 236 m of undulation as part of the work, not a bonus.