Puerto Carretero

Overview

Puerto Carretero is a category 2 ascent that packs a genuine day-defining effort into 8.7 kilometres. From a start elevation of 618 metres it works its way up to a summit at 1148 metres, a net gain of 530 metres and a total ascent of 505 metres once the small dips and false flats are accounted for. The average gradient of 6.06% sounds civilised, but the 15.38% maximum tells you the road does not hold that steady figure everywhere. This is a climb of contrasts: long stretches where you can find a rhythm, punctuated by ramps that force you out of it.

How the Gradient Unfolds

The story of Puerto Carretero is the gap between its two headline numbers. An average of 6.06% over 8.7 km would, if delivered evenly, be a metronomic tempo effort. Instead the road spikes to 15.38% at its worst, which is well over double the mean. That mathematics has a consequence: for every ramp that bites near 15%, there must be a corresponding stretch that sits below 6% to bring the average back down. Expect the climb to breathe. You will settle into sustainable pitches, then hit a wall that demands a sudden change of gear and posture, then recover as the gradient relents. The 530 metres of net gain arrive unevenly, front-loaded into the steep sections rather than metered out kilometre by kilometre. Reading the road ahead matters more here than raw fitness.

Pacing Notes

Because the gradient swings so widely, the smart approach is to pace off your sustainable power rather than the terrain in front of you. Anchor your effort to your FTP and try to keep your average close to it across the full 8.7 km, letting the steep ramps push you briefly above threshold and the shallower sections pull you back down. If you burn matches on every 15.38% pitch, the back half of the climb will punish you. If you are unsure of your threshold number, run it through the FTP estimator before you plan your ride. On a climb this variable, holding a steady internal effort while the external gradient lurches is the whole skill.

Gearing

With ramps touching 15.38%, gearing is not a place to be macho. A compact 34-tooth inner ring paired with a wide cassette is the sensible baseline. A 34×32 combination will get most fit riders up the steepest sections while still turning a decent cadence, and it keeps the drivetrain efficient on the shallower stretches where the 6.06% average lives. If you know you fade late, or you are carrying fatigue into the day, a 34×34 buys you extra insurance on the 15.38% pitches and lets you spin rather than grind. Given the total ascent of 505 metres, protecting your legs early with an easier gear pays dividends by the summit.

Summary

Puerto Carretero rewards patience and honest pacing. Respect the 15.38% ramps, gear low, hold your threshold, and let the 6.06% average do the rest across its 8.7 km.

Length: 8.7 km
Average gradient: 6.06%
Max gradient: 15.38%
Start: 618 m
Summit: 1148 m
Net gain: 530 m
Total ascent: 505 m
Category: 2