Paso de Unire

Paso de Unire cycling climb profile

Paso de Unire is the kind of climb where the headline number tells you most of the story, but not all of it. At 2.8 km with an average gradient of 13.45%, this is not a climb that rewards drifting into threshold and sorting it out later. It is short enough to invite aggression, but steep enough that going too hard early can turn the final section into damage limitation.

The road rises from 371 m to 750 m, with a listed net elevation gain of 379 m. That vertical gain packed into less than 3 km is the defining feature. There is no long settling-in phase here. The climb asks for torque immediately, and the 17.01% maximum gradient means the hardest ramps are severe enough to punish any mismatch between gearing, cadence, and pacing.

How the gradient unfolds

With an average of 13.45%, Paso de Unire should be treated as consistently steep rather than selectively steep. Even if the pitch varies along the way, the numbers leave very little room for meaningful recovery. On a climb this short and this steep, a slight easing is more likely to feel like a chance to regain rhythm than a true respite.

The tactical mistake is to ride the opening as if the distance is the limiter. It is not. The limiter is the repeated cost of producing force at low speed. Once the gradient pushes toward the maximum of 17.01%, cadence can collapse quickly, and any early overreach becomes expensive because speed drops so sharply on steep grades.

Pacing and gearing notes

Approach Paso de Unire as a controlled high-output effort, not a sprint with a summit attached. The first objective is to stay below the point where breathing and cadence both become ragged. If that happens early, the gradient gives you few options to recover without losing substantial speed.

A compact climbing gear is not optional for most riders. The average gradient alone justifies conservative gearing, and the 17.01% maximum makes it important to have one easier gear than you think you will need. Spinning is relative on a slope like this, but preserving cadence matters because once you are forced into grinding, every acceleration costs more.

Practical execution:

• Start seated and controlled, especially in the opening minutes.
• Shift early before the steepest ramps, not after cadence has already dropped.
• Use standing efforts selectively to get over the sharpest pitches, then sit back down to stabilize breathing.
• Keep power or perceived effort capped until the summit is realistically within reach.

For riders using /glossary/ftp as a reference, this is the kind of climb where sustainable power still matters, but muscular endurance and gearing can decide whether that power is usable. The profile is simple on paper: 2.8 km, very steep, no margin for sloppy pacing. Ride it with patience early, and the final meters become a hard finish rather than a survival exercise.