Puerto del Chapín

Overview

Puerto del Chapín is a compact, honest category 3 climb that packs a genuine punch into a short distance. Over 4.7 km it hauls you from 206 m at the base to 510 m at the summit, a net gain of 304 m. The average gradient of 6.46% is firmly in the sustained-effort range, and the total ascent of 300 m confirms this is a climb that goes almost relentlessly up rather than rolling. There is no long neutral run-in and no false flat to hide behind: from the moment the road tilts, the numbers demand attention. With a maximum gradient of 9.15%, it never quite crosses into wall territory, but it stays steep enough for long enough to reward riders who respect it early.

How the Gradient Unfolds

Do the arithmetic and the shape becomes clear. A 6.46% average over 4.7 km means the whole climb is uphill work, while the 9.15% maximum sits only about 2.69 percentage points above that average. That relatively narrow gap tells you this is a consistent climb rather than a spiky one. Expect the gradient to hover around the mid-single digits for much of the ascent, stiffening toward its 9.15% pitches where the road steepens but never collapsing into recovery. The 304 m of net gain matching the 300 m total ascent shows there is virtually no downhill on the way up. Ride it as one continuous, evenly-loaded effort rather than a series of separate ramps.

Pacing Notes

Because the gradient is so consistent, Puerto del Chapín rewards a steady, threshold-oriented pace. Aim to hold an effort just at or slightly below your FTP, leaving a small reserve for the steeper 9.15% sections near the top. At 4.7 km, most riders will be on the climb long enough that going out too hard in the first kilometre will cost you dearly before the summit at 510 m. If you are unsure of your threshold power, run the numbers through the FTP estimator first so you can set a realistic target wattage and pace the whole 304 m of gain evenly rather than by feel.

Gearing

For a 4.7 km climb at 6.46% average, most riders will want a compact setup. A 34×32 lowest gear is comfortable for strong climbers who can hold tempo through the 9.15% pitches without their cadence dropping too far. If you prefer to spin, or if you are carrying fatigue, a 34×34 gives valuable extra margin on the steepest ramps and keeps your legs fresher across the full 304 m of climbing. Either choice works here — the deciding factor is your preferred cadence and how hard you intend to push relative to your threshold.

Summary

Puerto del Chapín is a short but sincere test: a consistent, category 3 grind that keeps the pressure on from base to summit with almost no let-up. Pace it near threshold, pick the gearing that suits your cadence, and it rewards discipline over heroics.

Length: 4.7 km
Average gradient: 6.46%
Max gradient: 9.15%
Start: 206 m
Summit: 510 m
Net gain: 304 m
Total ascent: 300 m
Category: 3