Col de Morbieux

Col de Morbieux Cycling Climb: What the Numbers Tell You

Col de Morbieux is a Category 2 climb in France that covers 5.5 km from base to summit, gaining 336 m net elevation over that distance. The total ascent figure — 408 m — exceeds the net gain, which signals that the road doesn't simply rise in a straight line. There's enough undulation along the way to cost you more vertical work than a pure point-to-point profile suggests.

The Gradient Profile

The average gradient sits at 6.14%. That number alone puts this squarely in the range where sustained threshold power becomes the core demand — steep enough to require real commitment, forgiving enough that a disciplined rider won't be forced into the red from the first pedal stroke.

The catch is a maximum gradient of 16.08%. That's a meaningful spike — nearly three times the average — and it shapes how you must manage effort across the climb. A 16% pitch demands either a significant gear reduction or a short, controlled surge above threshold. Neither is free. The gap between average and maximum gradient here is wide enough that riders who pace solely to the average will arrive at that steep section already committed to the wrong gear or effort level.

How the Climb Rides

With 5.5 km of climbing starting at 463 m elevation and topping out at 799 m, Col de Morbieux is long enough to punish early aggression but short enough that a well-timed effort from a rider with good form can put time into rivals on the upper slopes.

The total ascent of 408 m versus a net gain of 336 m means roughly 72 m of "extra" climbing is absorbed by dips or false flats along the route. These sections offer partial recovery but also carry a pacing trap: it's easy to accelerate through the easier pitches and arrive at the steeper ramps with depleted legs.

Pacing Notes

• Set your ceiling early. Treat the opening kilometers as a calibration phase. The 6.14% average is manageable at 90–95% of FTP for trained climbers, but banking watts here costs you on the 16% section.
• Anticipate the steep ramp. The 16.08% maximum will arrive at some point along those 5.5 km. Know where it sits from a prior recce or GPS data. Approach it with a gear already selected, not one you're scrambling for mid-pitch.
• Gearing. A compact chainset (50/34) paired with a 32t or 34t cassette is appropriate for most riders given the 16% maximum. Riders on a standard double should confirm their lowest gear before committing to a race-pace effort.
• The false flats are not rest. The difference between net and total ascent tells you the road rolls. Use those easier stretches to normalize breathing and cadence, not to hammer.
• Category 2 context. As a Category 2 climb, Morbieux sits in the tier that tests but doesn't destroy. Use your FTP estimate to bracket a sustainable power range before the start rather than riding by feel.

Summary

Col de Morbieux is a compact but technically demanding Category 2 climb. The 6.14% average understates the challenge because of a 16.08% maximum gradient lurking in the profile. Ride the average smartly, gear for the spike, and account for the extra climbing hidden in the total ascent figure.