Coll de Perilló

Coll de Perilló cycling climb profile

Coll de Perilló is a long Spanish Category 1 climb that asks for patience more than aggression. On paper, 18.4 km at 4.96% looks controlled, but that average hides an important pacing trap: the climb still reaches a maximum gradient of 14.48%. That gap between the average and the steepest ramp tells you this is not simply a metronomic false-flat drag to the top.

The climb starts at 164 m and tops out at 1078 m, with a listed net elevation gain of 914 m. That makes it a sustained aerobic effort, long enough that poor pacing early will show up clearly near the summit. Even though the average gradient sits just under 5%, the duration implied by 18.4 km means this is still a climb to ride with respect.

How the gradient shapes the ride

The defining feature is contrast. A 4.96% average over 18.4 km suggests long sections where a seated rhythm should be possible, but the 14.48% maximum gradient means there are sharper ramps capable of breaking that rhythm. Without a kilometre-by-kilometre breakdown, the sensible interpretation is simple: do not pace this climb as if the average tells the full story.

Riders who attack the lower slopes because the gradient feels manageable can get caught out when the road steepens. On a climb with this much total length, every surge above sustainable power has a cost. The steepest pitches will demand torque, but the main performance limiter is likely not one short ramp. It is the accumulation of repeated efforts layered on top of a long climb.

Pacing and gearing notes

The best approach is to ride the opening part below threshold and let the climb come back to you. Treat the average gradient as a guide to the overall load, not as a promise that the road will stay easy. If using power, this is a climb where anchoring effort around your sustainable climbing range matters more than chasing speed changes. For reference, see /glossary/ftp if you use FTP to set climbing intensity.

Gearing should account for the 14.48% maximum gradient, not just the 4.96% average. A setup that feels efficient on moderate gradients may become overgeared on the steepest ramps, especially late in the climb when cadence naturally starts to fall. If there is any doubt, choose the lower gear option. Saving muscular fatigue is more valuable here than carrying a slightly larger gear on the easier sections.

What type of rider it suits

Coll de Perilló rewards riders who can hold a smooth, economical tempo and manage variability without repeatedly spiking effort. Pure punch is useful only if it is controlled. The climb is long enough that the strongest ride will usually come from restraint early, compact gearing on the steepest gradients, and a steady final build toward the summit rather than a start-to-finish chase of the average speed.