Puerto de Orduña

Overview

Puerto de Orduña is a Category 1 climb in Spain (ES), packing serious difficulty into a compact distance. It runs 6.2 km from a start elevation of 273 m to a summit at 838 m, for a net elevation gain of 565 m. At an average gradient of 9.15%, this is a genuinely hard ascent that leaves little room to hide over its short length.

The total ascent recorded on the climb is 625 m, which is 60 m more than the 565 m net gain. That gap tells you the road is not a clean, monotonic climb — it rises, briefly relents, and rises again. Every one of those 60 extra metres is elevation you claw back after giving some away, so the effort is punchier and more variable than the average gradient alone would suggest. Expect to change rhythm repeatedly rather than settle into a single fixed cadence.

How the Gradient Unfolds

An average of 9.15% is already steep, but averages flatten out the story. On a climb with this much undulation, the mean sits between softer sections and ramps that bite well above it. Read the gradient as a series of surges rather than one continuous wall.

• Short flatter or shallow-recovery sections where the road eases and you can reset your breathing.
• Repeated short pitches that stack up, each demanding a fresh effort as the grade kicks back up.
• The steepest ramp, well above the 9.15% average, where you will be out of the saddle or grinding your lowest gear.

Pacing Notes

On an undulating climb like this, chasing even speed is a trap — you will overcook the steep ramps and coast the flatter bits. Pace to even effort instead, holding a steady sustainable power output through the pitches and letting your speed rise and fall with the gradient. Absorb the short recovery sections without surging, then meter your effort back onto the steep ramps.

If you do not know your ceiling, run the numbers through the FTP estimator first, then set a target you can hold for the full 6.2 km. On a climb this steep, going 20 watts too hard early will cost you far more than it saves.

Gearing

The steep ramps here demand gearing that lets you keep the pedals turning without wrenching your cadence to a stall. Fit a compact or sub-compact chainset paired with a wide-range cassette — think 34×32 or 34×34 — so you have a bailout gear for the steepest pitches. Check your setup before the ride; discovering you have run out of sprockets partway up a 9.15% wall is not the time to learn your cassette is too tight.

Summary

• Length: 6.2 km
• Average gradient: 9.15%
• Net elevation gain: 565 m
• Total ascent: 625 m
• Category: 1

Puerto de Orduña is short, steep, and lumpy — a climb that punishes poor pacing and rewards a rider who arrives with the right gears and a clear power target. Set your effort, respect the ramps, and let the recovery sections do their job.