Abra de Porculla

Overview

Abra de Porculla is a long-haul hors catégorie ascent that measures 33.3 km from base to summit. It begins at 369 m and finishes at 2125 m, delivering 1756 m of net elevation gain along the way. With a total ascent of 1737 m recorded across its length, this is an endurance climb first and a steep climb second — the average gradient sits at a manageable-looking 5.27%, but sustaining that for well over an hour is the real test. The gap between net gain and total ascent tells you the road is not relentlessly upward; a small handful of flatter or dipping sections break the profile before the road tips back up toward the pass.

How the Gradient Unfolds

At 33.3 km, this climb rewards riders who read the road rather than attack it. The 5.27% average is a moderate number, but the max gradient of 12.29% shows that the climb hides sharper pitches inside its long body. Because total ascent (1737 m) falls just short of the net gain (2125 m minus 369 m equals 1756 m), the climbing is almost uniformly directional — you gain height steadily rather than clawing it back after descents. Expect the steepest ramps toward 12.29% to arrive in short bursts, likely where the road bends to gain height quickly, sandwiched between longer stretches sitting close to or just under the average.

Pacing Notes

On a climb this long, pacing is everything. Aim to ride the bulk of the 33.3 km at an effort you can hold for the full duration — for most riders that means settling in around threshold or just below. Knowing your FTP turns this from a guessing game into a plan: it lets you set a power ceiling for the shallow sections and a survivable range for the 12.29% ramps. If you have not tested recently, run your numbers through the FTP estimator before committing to a target. The trap on a 5.27% average is going out too hard on the gentle early kilometres and having nothing left for the steeper pitches higher up, where the thinner air near 2125 m compounds the effort.

Gearing

With 1756 m of climbing to absorb and pitches touching 12.29%, gear low and gear early. A compact 34-tooth inner chainring is the sensible foundation here. Pair it with at least a 34×32 for the sustained work, and if you tend to spin or you are carrying fatigue into the higher slopes, step up to a 34×34 to keep your cadence alive on the steepest ramps. The extra range costs nothing on the flatter sections and buys you insurance across 33.3 km where seated rhythm beats muscular grinding. Riders who prefer to stand through the pitches can manage with less, but for a full HC ascent the wider cassette is the smarter call.

Summary

Abra de Porculla is a patient rider's climb: 33.3 km of steady elevation gain that asks for measured pacing, sensible gearing, and respect for its length rather than fear of its slopes. Get your effort right early and the 12.29% ramps become moments to manage, not walls to dread.

Length: 33.3 km
Average gradient: 5.27%
Max gradient: 12.29%
Start: 369 m
Summit: 2125 m
Net gain: 1756 m
Total ascent: 1737 m
Category: HC