Puerto de San Vicente (mountain pass)

Overview

Puerto de San Vicente is a Category 3 mountain pass in Spain. It runs 9.6 km from base to summit, lifting you from a start elevation of 444 m to a summit of 814 m for a net elevation gain of 370 m. On paper it reads as a moderate climb, and the category confirms that: this is a manageable ascent rather than a marquee mountain, but the numbers only tell half the story.

The gap between the net elevation gain and the total ascent is where the real character shows. You gain 370 m net, but the climb makes you ascend 532 m in total. That 162 m difference means the road gives back roughly a third of your climbing on descents and false flats, then asks for it again. Every metre lost to a dip has to be re-earned, so the effort is choppier and more demanding than a clean 370 m pull would be.

How the Gradient Unfolds

The 3.87% average is a blend, not a constant. With 162 m of undulation baked in, long stretches sit well below average while short pitches spike well above it. The steepest ramp hits 13.38%, more than three times the average, so the hardest metres arrive in concentrated bursts rather than a steady grind.

• Flatter and recovery sections: expect false flats and short descents that pull the average down and interrupt any rhythm.
• Repeated short climbs: the undulation means you re-attack several times rather than settling into one effort.
• The steepest ramp: a pitch near 13.38% that will spike your heart rate and force a gear change.

Pacing Notes

On an undulating climb like this, chasing even speed is a trap: you would overspend on every ramp and coast the descents, spiking your effort exactly where it costs most. Aim instead for even effort. Hold a steady sustainable power output through the steep pitches, let your speed rise on the flatter sections, and soft-pedal the descents to recover. Knowing your ceiling before you start makes this far easier — run the numbers through the FTP estimator so you have a target wattage to hold across the 9.6 km rather than reacting to the gradient.

Gearing

The 13.38% maximum is what dictates your setup, not the gentle average. Even a strong rider will want a low bailout gear for that ramp. Fit a compact (50/34) or sub-compact chainset paired with a wide-range cassette — a 34×32 or 34×34 gives you a spin-friendly ratio for the steepest metres without wrecking your cadence. Check your chainring and cassette combination before you ride; discovering you are over-geared on a 13% pitch is a mistake you only make once.

Summary

• Length: 9.6 km
• Average gradient: 3.87%
• Maximum gradient: 13.38%
• Net elevation gain: 370 m
• Total ascent: 532 m
• Category: 3

Puerto de San Vicente is a modest climb on paper that rides harder than its average suggests. Respect the undulation, pace on effort not speed, and gear for the 13.38% ramp, and this Category 3 pass becomes a well-managed 9.6 km rather than a series of overcooked surges.