Alto de Romera

Overview

Alto de Romera is a category 1 ascent that asks for patience and steady legs. Over 12.3 km it climbs at an average gradient of 6.85%, lifting you from a start elevation of 1601 m to a summit at 2443 m. That is 842 m of net elevation gain, with a total ascent of 824 m once you account for the handful of shallow reprieves along the way. The steepest pitch bites at 11.92%, so while the average sounds manageable, the climb hides real punch in its harder ramps. It is long enough to matter and steep enough to hurt — the kind of effort that rewards a rider who respects the distance early.

How the Gradient Unfolds

The number that tells the story here is the gap between average and max: a 6.85% mean against an 11.92% peak. A climb that averages under 7% but touches nearly 12% is not evenly sloped — it pulses. Expect stretches that sit comfortably below the average, followed by ramps that spike well above it. Because total ascent (824 m) sits just under the net gain (842 m), there is very little descending or false-flat relief across the 12.3 km; almost every metre is spent going up. Treat the gentler sections as recovery windows, not as places to attack, and save something for the pitches that climb toward that 11.92% ceiling.

Pacing Notes

The single biggest mistake on a climb this long is starting above your sustainable output. Anchor your effort to your FTP and hold a percentage you can carry for the full 12.3 km rather than the first few kilometres. If you are unsure of your ceiling, run the numbers through the FTP estimator before you ride so your target power is honest. On the steeper ramps toward 11.92%, let cadence drop and power rise briefly, then settle back to your baseline once the road eases. With 842 m to gain from 1601 m to 2443 m, the summit sits high enough that thinner air will nibble at your top-end late in the effort — pace conservatively early so you still have legs above 2000 m.

Gearing

For a 12.3 km climb averaging 6.85% with ramps to 11.92%, gear for the steepest section, not the average. A compact 34-tooth chainring paired with a 34×32 cassette gives most riders enough range to keep cadence up on the harder pitches. If you carry any fatigue, ride at a lower power-to-weight, or simply want to spin rather than grind, step up to a 34×34 — the extra sprocket is cheap insurance against grinding to a halt on the 11.92% ramps near the top. Given the 842 m of climbing, comfortable gearing pays for itself over the full ascent.

Summary

Alto de Romera is a genuine category 1 test: a long, uneven climb that combines sustained gradient with sharp punches and a high-altitude finish. Pace it to your FTP, gear it for the steep ramps, and respect the thin air near 2443 m.

Length: 12.3 km
Average gradient: 6.85%
Max gradient: 11.92%
Start: 1601 m
Summit: 2443 m
Net gain: 842 m
Total ascent: 824 m
Category: 1