Portachuelo de Matalacas

Portachuelo de Matalacas cycling climb profile

Portachuelo de Matalacas is not defined by one savage wall. It is defined by scale. At 68.7 km, with 2,591 m of net elevation gain from 790 m to 3,381 m, this is an HC climb because it asks the same question for a very long time: can you keep producing controlled power without letting the early slope, the length, or the steeper ramps pull you out of your plan?

The headline average of 3.77% can make the climb look more forgiving than it will feel on the road. Over this distance, that gradient still accumulates into a major vertical load, and the total ascent of 2,833 m tells you the road is not simply a clean, constant ramp from bottom to top. There is more climbing in the ride than the net gain alone, which means any easing or loss of elevation has to be paid back later.

How the gradient unfolds

With only the overall profile statistics, the right way to read Portachuelo de Matalacas is as a long, variable endurance climb rather than a short threshold test. The average gradient points to many rideable sections where momentum and aerobic efficiency matter. But the maximum gradient of 9.86% changes the gearing and pacing equation. Even if those steeper pitches are not the dominant character of the climb, they are steep enough to punish riders who arrive overgeared or already riding too close to their limit.

That contrast is the key tactical feature. The climb will likely feel manageable for long stretches, which is exactly why it can become dangerous. On a climb this long, the cost of small over-pacing errors compounds. A few hard accelerations on the steeper ramps, or repeatedly chasing speed on gentler ground, can turn the upper portion into damage control.

Pacing and gearing notes

Treat the lower slopes as the investment phase. The goal is not to prove the climb is easy. It is to keep breathing, cadence, and fueling under control so the final elevation gain is still something you can ride, not survive.

Practical approach:

• Pace from effort, not speed. The average gradient is modest, but the climb is too long to chase a target pace early.
• Stay below your sustainable climbing ceiling for the first long block. If you know your /glossary/ftp, this is a climb where discipline below threshold matters more than a high opening number.
• Choose gearing for the 9.86% maximum gradient, not the 3.77% average. You need a low enough gear to keep torque under control when the road kicks up.
• Use the gentler sections to reset, fuel, and smooth your cadence. Do not turn every easing in the road into an acceleration.
• Expect the total ascent of 2,833 m to make the climb feel heavier than the net gain alone suggests.

Bottom line

Portachuelo de Matalacas is a long aerobic grind with enough gradient variability to punish impatience. The winning strategy is controlled restraint: ride the easier gradients efficiently, respect the near-10% ramps, and save the real effort for the upper half when the accumulated ascent starts to matter.