Puertu de Ḷḷeitariegos

Overview

Puertu de Ḷḷeitariegos is a long-haul Category 1 ascent that rewards patience over punch. From a start elevation of 404 m it stretches out across 27.5 km, climbing to a summit at 1524 m. That works out to a net elevation gain of 1120 m, with a total ascent of 1122 m once the small dips and false flats are counted — the 2 m difference tells you this is an almost relentlessly upward road with barely any respite going the other way.

The headline number is the average gradient of 4.08%, which sounds forgiving. And for long stretches it is. But the max gradient of 16.88% is more than four times that average, so treating the whole climb as a gentle drag is a mistake. This is a mountain that hides its teeth inside a very long, mostly moderate profile.

How the Gradient Unfolds

At 27.5 km, Ḷḷeitariegos is a climb of accumulation rather than sudden violence. A 4.08% average spread over that distance means most of the road sits in the low single digits — the kind of gradient you can hold in the saddle and roll through with rhythm.

The danger is the variance. To average 4.08% while touching 16.88%, the climb must balance those steep ramps against long, shallow, almost-flat sections. Expect the road to lull you into a comfortable cadence and then rear up. Because the 1120 m of net gain is smeared across 27.5 km, the hardest ramps arrive as spikes against an easy baseline, and they hurt far more when your legs have settled into cruise mode. Read the road ahead and shift early.

Pacing Notes

On a climb this long, your effort target should sit around threshold, not above it. Anchor your pacing to your FTP: the sustained average gradient of 4.08% is exactly the terrain where riding a hair below FTP for the full 27.5 km beats surging and blowing up on the first steep ramp.

The trap is the 16.88% pitches. Let power spike briefly there, but keep the overall climb a threshold-or-below effort — the length, not the steepness, is what defeats most riders here. If you don't know your number, run the numbers through the FTP estimator before you commit to a pace over 1120 m of climbing.

Fuel like it's a long climb, because it is. More than an hour of steady work over 27.5 km means eating and drinking on the shallow sections while it's still easy to.

Gearing

The 4.08% average tempts riders toward a road-race setup, but the 16.88% max is the number that dictates your cassette. Combine steep ramps with tired legs deep into a 27.5 km effort and you'll want gears in reserve.

A compact 34-tooth inner chainring paired with a 34×32 low is the sensible minimum for most riders tackling those 16.88% pitches. If you climb at a lower cadence, carry extra weight, or simply want insurance across 1120 m of gain, size up to 34×34. On a climb this long the lighter gear costs you nothing on the shallow miles and saves your legs on the ramps.

Summary

Puertu de Ḷḷeitariegos is a Category 1 endurance test: 27.5 km and 1120 m of net gain at a deceptively mild 4.08% average, spiked with ramps up to 16.88%. Pace it at threshold, gear for the steep bits, and let the length — not the gradient — set your ambition.

Length: 27.5 km
Average gradient: 4.08%
Max gradient: 16.88%
Start: 404 m
Summit: 1524 m
Net gain: 1120 m
Total ascent: 1122 m
Category: 1