Alto de Comijoque

Alto de Comijoque cycling climb profile

Alto de Comijoque is not defined by one savage wall. It is defined by duration. At 29.5 km with an average gradient of 6.38%, this is an HC climb that asks for a controlled, repeatable effort rather than a short surge of strength. The road rises from 1099 m to 2979 m, which means the challenge is not only the gradient under the wheels, but the length of time spent climbing.

The key number is the net elevation gain of 1880 m. Spread across nearly 30 km, that creates a climb where the average is hard enough to matter, but not so extreme that it forces a survival rhythm from the first ramps. That is what makes pacing important. A rider who treats the opening kilometres like a short climb will be carrying that mistake for a long time.

How the gradient unfolds

With an average of 6.38% and a maximum gradient of 11.02%, Alto de Comijoque is best read as a sustained aerobic climb with sharper sections layered into it. The average tells you the climb is steady enough to keep pressure on the pedals almost continuously. The maximum tells you there are places where cadence can drop quickly if gearing is too ambitious.

That combination changes the tactical feel of the climb. The 11.02% pitches are not the whole story, but they are where fatigue gets exposed. If you arrive at them already riding above your sustainable climbing power, they become expensive. If you have kept the effort controlled, they are manageable interruptions rather than race-ending moments.

Pacing and gearing notes

The right approach is to start below instinct. On a 29.5 km ascent, the first third should feel almost conservative. The gradient average is high enough that the climb will naturally accumulate load, so there is no need to force the selection early unless the objective is racing rather than simply riding it well.

For pacing, anchor the effort around a sustainable climbing intensity and avoid chasing speed changes on steeper ramps. If using power, this is a climb where discipline around /glossary/ftp matters more than momentary strength. Let the road tilt up to 11.02% without responding with a full acceleration every time. The cost of repeated spikes compounds across this much vertical gain.

Gearing should leave a real low option. The average gradient may look moderate for a high-mountain climb, but the maximum gradient means riders need enough range to keep cadence from collapsing when the road steepens. A compact or climbing-oriented setup makes sense here, especially for riders aiming to ride the full climb evenly rather than grind through the hardest ramps.

What it rewards

Alto de Comijoque rewards patience, fueling discipline, and a clean pacing plan. The climb is long enough that small errors become visible, and high enough in elevation gain that there is no hiding from sustained output. Ride it as one continuous effort with a few harder sections embedded inside it, not as a sequence of attacks. That is the difference between reaching the summit still in control and spending the final kilometres managing damage.