Puerto de Oro

Overview

Puerto de Oro is a category 3 climb that runs for 8.8 km at an average gradient of 3.91%. It starts at 414 m and tops out at 760 m, a net elevation gain of 346 m over the ascent. On paper those numbers read gentle, and for long stretches they are — but the 11.96% maximum gradient tells you this road does not stay uniform. It is a climb of two personalities: a rolling, spinnable base and a handful of sharp bites that force you to change gear and mindset. Understanding where the effort lives is the difference between arriving at the top fresh and arriving cooked.

How the Gradient Unfolds

The headline figure — 3.91% over 8.8 km — is an average, and averages hide the story. With a maximum pitch of 11.96%, the difference between the mean and the steepest ramp is real: some sections sit well below the average while others spike to roughly three times it. That means the climb is not a steady drag but a sequence of shallower recovery zones punctuated by short, punchy walls. The total ascent of 337 m sits just under the 346 m net gain, so there is very little false-flat descending along the way — nearly all of your vertical work is spent going up. Expect the gradient to ease enough to let you breathe, then stiffen without much warning.

Pacing Notes

Because the effort is uneven, pace to the climb's average rather than its steepest ramp. Anchor your target power to your FTP: a gradient around 3.91% is comfortably a sub-threshold, sustainable effort for most riders, so ride the flatter kilometres at a controlled tempo and save matches for the 11.96% pitches. Do not chase the steep sections at full gas — let cadence drop, absorb the ramp, and settle again once it relents. If you are unsure what number to hold, run your recent data through the FTP estimator and use that figure to set a ceiling you can carry across the whole 8.8 km without blowing up before the 760 m summit.

Gearing

For a climb averaging 3.91% you will spin comfortably in the middle of your cassette most of the way — but the 11.96% ramps are where gearing earns its keep. A compact setup is ideal here. A 34×32 gives most riders enough range to stay seated and turning a respectable cadence on the steep bites, and if you prefer to protect your knees or ride the wall at higher revs, a 34×34 buys extra margin for very little penalty. Given the short but sharp maximum pitches against an otherwise moderate average, err toward the easier ratio: it costs nothing on the shallow sections and rescues you on the steep ones.

Summary

Puerto de Oro rewards a smart, measured ride: hold tempo on the gentle grade, respect the 11.96% ramps, and let compact gearing carry you cleanly to the 760 m top.

Length: 8.8 km
Average gradient: 3.91%
Max gradient: 11.96%
Start: 414 m
Summit: 760 m
Net gain: 346 m
Total ascent: 337 m
Category: 3