Puerto de las Estacas de Trueba

Overview

Puerto de las Estacas de Trueba is a Category 1 climb in Spain (ES). It runs 10.4 km from a start elevation of 350 m to a summit at 1150 m, for a net elevation gain of 800 m. That places it firmly in the range where the climbing is long enough to demand a plan, not just fitness.

The number that reshapes this climb is the gap between net gain and total ascent. You gain 800 m of altitude, but you actually climb 1296 m — nearly 500 m of that is bonus ascent you give back on descents and false flats along the way. This is an undulating road, not a steady drag. Every metre you descend has to be re-climbed, so the effort is spikier than the 7.69% average suggests, and your legs pay for the terrain twice.

How the Gradient Unfolds

The 7.69% average is a blend, and it hides more than it tells. With 1296 m of total ascent packed into a road that only nets 800 m, the profile rolls: sections that ease off or tip downhill are stitched between harder pitches, so the steep ramps run well above average.

• Flatter and recovery sections where the road briefly levels or drops — these are what create the ascent-versus-net gap.
• Repeated short climbs that stack up, so the grind resets several times rather than building once.
• The steepest ramps, which sit noticeably above the 7.69% mean and are where surges will cost you.

Pacing Notes

On an undulating climb like this, even-effort beats even-speed. Chasing a constant speed forces you to spike hard over every rise and coast the descents, burning matches you need later. Instead, hold a steady output and let your speed rise and fall with the road.

Anchor that output to your sustainable power output and ride the climbs just under threshold, easing on the recovery sections rather than hammering them. If you do not know your ceiling, run the FTP estimator first so your target is a real number, not a guess across 1296 m of climbing.

Gearing

Bring climbing gears. On a Category 1 ascent this long, with ramps running well above the 7.69% average, a standard road setup will leave you grinding. Fit a compact or sub-compact chainset and a wide-range cassette — a 34×32 or 34×34 gives you a spinnable bailout gear for the steepest pitches without cross-chaining.

Check your setup before the ride, not at the base of the climb. Confirm the cassette clears the derailleur and the chain is long enough for the big sprocket while there is still time to fix it.

Summary

• Length: 10.4 km
• Average gradient: 7.69%
• Net elevation gain: 800 m
• Total ascent: 1296 m
• Category: 1

Puerto de las Estacas de Trueba is a long Cat 1 effort defined less by its average than by its undulation: 800 m net over 10.4 km, but 1296 m of real climbing. Pace it by effort, gear it for the ramps, and let the rolling road come to you.