Portella de Morens

Overview

Portella de Morens is a genuine hors catégorie monster. Over 24.1 km it climbs from a valley floor at 438 m to a summit at 2429 m, an average gradient of 8.26% that almost never lets up. The net elevation gain is 1991 m, with 1959 m of total ascent recorded across the profile — meaning there is effectively no descending to break the rhythm. This is a climb defined by its length as much as its steepness: hold 8.26% for nearly an hour and a half and the accumulated fatigue becomes the real adversary. When the gradient spikes to 23.43% on its worst ramp, it does so on legs already deep into the effort.

How the Gradient Unfolds

The math tells the story. A 24.1 km climb averaging 8.26% is brutal on paper, but the 23.43% maximum reveals that the average hides sharp variation. Some sections must sit well below 8.26% for others to tip past 23%, so expect the road to pulse between merely hard and savagely steep. From 438 m the elevation stacks steadily upward, and because total ascent (1959 m) sits just under net gain (1991 m), the pitch is overwhelmingly one-directional — you climb, and you keep climbing, with almost nothing given back. Treat the 8.26% figure as your baseline reality and the 23.43% ramps as moments to survive rather than attack.

Pacing Notes

On a climb this long, pacing discipline is everything. Anchor your effort to your FTP: riding the sustained 8.26% sections at or just below threshold keeps you from blowing up before the summit at 2429 m. The steep 23.43% pitches will force your power far above threshold no matter how controlled you are — accept those surges, then settle back down immediately afterward rather than chasing lost time. If you are unsure of your current threshold, run the numbers through the FTP estimator before you commit to a target. With 1991 m of net gain ahead, going out even slightly too hard in the first third is the classic way to unravel over the final kilometres.

Gearing

Gear for the 23.43% maximum, not the 8.26% average. On a 24.1 km climb with pitches this steep, most riders will want a compact 34-tooth chainring paired with a wide cassette. A 34×32 is the sensible minimum and will get many strong riders over the top, but for the 23.43% ramps arriving late in a 1991 m ascent, a 34×34 gives you the extra margin to keep cadence up and legs turning rather than grinding to a standstill. If your setup allows anything easier still, use it — nobody regrets a bailout gear on an HC climb this long.

Summary

Portella de Morens asks for endurance, patience and honest gearing. Meter your effort against threshold, respect the length, and save something for the ramps near the 2429 m summit.

Length: 24.1 km
Average gradient: 8.26%
Max gradient: 23.43%
Start: 438 m
Summit: 2429 m
Net gain: 1991 m
Total ascent: 1959 m
Category: HC