Puerto de El Portillón

Overview

Puerto de El Portillón is a long, gentle-to-moderate ascent that stretches across 14.5 km. At an average gradient of 3.4%, it sits firmly in the "tempo grind" category rather than the leg-shattering wall — this is a climb you settle into rather than survive. It carries a category 3 rating, placing it toward the easier end of the classified scale (behind HC, 1, and 2), but its length means it still demands respect and a disciplined pace.

From a start elevation of 78 m to a summit at 571 m, the road delivers a net elevation gain of 493 m. The total ascent of 481 m tells you almost the entire climb points upward, with only a whisper of respite along the way. The gap between the two figures — a mere 12 m — confirms there's virtually no downhill to recover on.

How the Gradient Unfolds

The headline average of 3.4% masks the real shape of the road. With a maximum gradient of 8.45%, El Portillón has genuine bite tucked inside its otherwise moderate profile. Do the arithmetic and the steepest pitch runs roughly 5.05 percentage points above the average — enough to spike your effort if you're caught in the wrong gear.

Because the average is so much lower than the peak, expect the climb to breathe: shallow, spinnable stretches that lull you into comfort, punctuated by sharper ramps that force a response. Over 14.5 km, that rhythm repeats, and the smartest riders learn to read the road ahead rather than react to each pinch.

Pacing Notes

The trap on a climb like this is starting too hard on the friendly early gradients and paying for it when the road tilts toward 8.45%. Hold your effort near or just below threshold — your FTP is the number to anchor to. On the flatter sections, resist the urge to hammer; bank that energy for the steeper ramps.

If you don't know your threshold power, run the numbers through the FTP estimator before you ride. Knowing that figure turns a 14.5 km unknown into a manageable, measurable effort where you meter watts rather than guess.

Gearing

At 3.4% average you won't be desperate for bailout gears, but the 8.45% max means you'll want insurance. A compact chainring paired with a wide-range cassette covers the full 14.5 km comfortably. A 34×32 handles the steeper pitches for most riders in reasonable form, giving you a spinnable cadence when the road bites.

If you tire late, prefer a lighter touch, or simply want margin on the maximum ramp, a 34×34 buys you extra breathing room without costing anything on the shallow stretches. Given the climb's length, err toward the easier setup — a fresh cadence at the summit beats a heroic gear at the base.

Summary

Puerto de El Portillón rewards patience: a steady 14.5 km pull with occasional teeth, best ridden at controlled effort with gearing that keeps you spinning. Get the pacing right and the 493 m of gain arrives smoothly.

Length: 14.5 km
Average gradient: 3.4%
Max gradient: 8.45%
Start: 78 m
Summit: 571 m
Net gain: 493 m
Total ascent: 481 m
Category: 3