Iberian Gates

Overview

Iberian Gates is a long, patient Category 2 climb that trades drama for duration. Over 20.8 km it lifts you from 1439 m to a summit of 2126 m, a net gain of 687 m at an average gradient of just 3.3%. On paper that number reads gentle, and for long stretches it is — but the total ascent of 689 m tells you the road is not a single clean ramp. Those extra couple of metres beyond the net figure hint at brief kicks and recoveries stitched into the profile. The real story here is time in the saddle: at more than 20 km, this is a climb you settle into rather than attack.

How the Gradient Unfolds

The defining tension of Iberian Gates is the gap between its average and its maximum. A 3.3% mean gradient is barely more than a false flat, yet the steepest pitch bites at 7.72% — more than double the average. That spread means the climb cannot be uniform. Expect long, shallow sections where you can hold speed and even big-ring the pedals, punctuated by short, sharper ramps that force a gear change and a rise out of the saddle. Because the road only nets 687 m of elevation across 20.8 km, every steeper pitch is balanced by flatter recovery, so momentum matters. Carry speed into the ramps and you can blunt the 7.72% moments considerably.

Pacing Notes

This is a rhythm climb, and rhythm rewards discipline. On a gradient averaging 3.3%, the temptation is to push too hard early because it feels easy — then the accumulated 20.8 km quietly empties your legs before the 2126 m summit. Anchor your effort to your FTP: aim to sit just below threshold on the shallow sections and allow short surges over threshold only on the 7.72% pinches, settling back down immediately after. If you do not know your threshold number, run the numbers through the FTP estimator before you ride, then set a power ceiling and hold it. On a climb this long, a slightly conservative first two-thirds almost always beats a heroic opening.

Gearing

Because the average is so modest, you do not need an ultra-wide cassette to survive Iberian Gates — but the 7.72% ramps and the sheer length argue against going too tall. A compact 34-tooth chainring paired with a 34×32 low gear gives most riders enough spin to hold cadence through the steeper pitches without grinding. If you climb at a naturally high cadence, tip toward heavier or larger riders, or simply want insurance for the back half when 687 m of climbing has piled up in the legs, step to 34×34. The extra teeth cost nothing on the flatter kilometres and buy real comfort when the road tilts up.

Summary

Iberian Gates is a long-format Category 2 climb defined by contrast: a benign 3.3% average masking 7.72% teeth, stretched across 20.8 km to a high-altitude finish at 2126 m. Ride it with a steady, threshold-aware rhythm and gearing that lets you spin, and the 687 m of climbing unspools smoothly beneath you.

Length: 20.8 km
Average gradient: 3.3%
Max gradient: 7.72%
Start: 1439 m
Summit: 2126 m
Net gain: 687 m
Total ascent: 689 m
Category: 2