Puerto del Mojón

Overview

Puerto del Mojón is a category 3 climb that runs for 6.6 km at an average gradient of 4.72%. From a start elevation of 489 m it lifts you to a summit at 799 m, a net elevation gain of 310 m across the effort. The recorded total ascent is 297 m, a touch under the net figure — a reminder that the road doesn't climb in a single unbroken line, but rolls slightly on its way up. With a maximum gradient of 7%, nothing here is truly savage; this is a climb defined by rhythm rather than by any single wall.

How the Gradient Unfolds

The story of Puerto del Mojón is consistency. An average of 4.72% over 6.6 km places it firmly in tempo territory, and the 7% maximum tells you the steepest ramps only ever edge a couple of points above that average. There are no double-digit pitches to blow your legs apart, but there is also very little genuine respite. Because the total ascent of 297 m sits just below the 310 m net gain, you can expect a handful of shallow flatter sections or brief kicks that break the cadence without ever handing you a true recovery stretch. Read the climb as a long, even gradient with gentle undulations layered on top — the kind of profile where the number on your head unit barely moves for minutes at a time.

Pacing Notes

A climb this steady rewards discipline over heroics. The 6.6 km length at 4.72% is long enough to punish an over-eager start but short enough that a controlled effort near threshold is sustainable end to end. Aim to settle into a wattage you can hold for the full 6.6 km rather than surging on the shallow ramps toward 7%. Anchoring your pace to your FTP is the cleanest way to do this: hold a comfortably-hard percentage of it from the base and lift only in the final kilometre toward the 799 m summit. If you're unsure of your current number, run the FTP estimator before you plan the effort so your target watts are grounded in real data rather than guesswork.

Gearing

Because the gradient tops out at 7% and averages under 5%, Puerto del Mojón does not demand ultra-compact gearing. A 34×32 setup gives most riders enough range to spin the steeper ramps without grinding, and it keeps your cadence high across the long tempo stretches. If you prefer to sit and turn the pedals rather than muscle a bigger gear — or if you're carrying fatigue or riding at altitude near the 799 m summit — a 34×34 adds a welcome bailout cog for the final pitches. Either way, favour a light gear and a smooth cadence over pushing hard on the flatter sections.

Summary

Puerto del Mojón is an honest, evenly-graded category 3 climb: 6.6 km of steady tempo that gains 310 m to a 799 m top, with a maximum of just 7%. Pace it to your threshold, gear it comfortably, and it becomes a satisfying rhythm effort rather than a survival grind.

Length: 6.6 km
Average gradient: 4.72%
Max gradient: 7%
Start: 489 m
Summit: 799 m
Net gain: 310 m
Total ascent: 297 m
Category: 3