Col de Fouchy

Overview

Col de Fouchy sits in the Vosges foothills of northeastern France, a Category 3 climb that earns its category almost entirely through one savage ramp rather than sustained brutality. At 8.8 km with an average gradient of 4.34%, the numbers suggest a comfortable afternoon — until you hit the 22.44% maximum pitch. That single statistic changes everything about how this climb should be approached.

The net elevation gain is 383 m, but the total ascent figure of 598 m reveals that the road is not a clean, unbroken rise. Undulations exist, meaning legs already stressed by steep sections must push again after brief recoveries. Plan for that discrepancy between net gain and total climbing.

How the Climb Rides

From the start at 239 m, the opening kilometres are genuinely manageable. The average of 4.34% across 8.8 km includes significant stretches of gentler terrain, so the early riding can feel almost pedestrian. Resist the temptation to overcook the pace here — the road is building a trap.

The defining feature is the 22.44% maximum gradient section. A ramp of that severity on a climb that averages well under 5% means it arrives as a violent contrast, not a gradual escalation. When it comes, forward momentum can disappear instantly if gearing is wrong or power is already depleted. After that peak pitch the total ascent-versus-net-gain math suggests some descent or flat before the gradient reasserts itself toward the 622 m summit.

Pacing Strategy

Treat the average gradient as a near-irrelevant headline figure on Col de Fouchy. Base your pacing on the maximum, not the mean.

• First half: Hold well below threshold. The easy terrain invites overriding; that is the climb's primary way of breaking riders.
• Approaching the steep ramp: Identify it early. Drop into your lowest gear before you need it — shifting under maximum torque on a 22%+ pitch risks a dropped chain or missed shift.
• On the ramp itself: Shorten your cadence expectations. Even well-geared riders may drop into the 50–60 rpm range. Stay seated to maintain rear-wheel traction; standing risks rear-wheel slip on extreme gradients.
• After the ramp: If the road eases, use any flatter ground to recover breathing before the final push to 622 m, rather than accelerating into it.

Gearing Notes

With a 22.44% maximum gradient, a compact chainset (50/34) paired with an 11-32 or wider cassette is the sensible minimum for most riders. Anyone on a standard 53/39 setup without a suitable cassette depth will be grinding or standing and burning matches well before the summit. If you are uncertain how your gearing matches to steep gradients, use the FTP estimator to model your power-to-weight demands and cross-reference against your gear ratios.

For context on how gradient categories work and how Category 3 is assigned, see the glossary entry on climb categorisation.

Summary

Col de Fouchy is a Category 3 climb that punishes assumptions. Its 4.34% average is comfortable on paper; its 22.44% maximum is not. Ride the first 8 km with discipline, protect your lowest gear for when the road walls up, and account for the undulating profile that inflates total ascent to 598 m despite a 383 m net gain. Riders who respect those numbers will summit cleanly; riders who treat it as a gentle foothills roll will not.