Puerto de Peña Betoño

Overview

Puerto de Peña Betoño is a short, honest climb that packs a real punch into a small distance. Over just 4 km the road lifts you from 618 m at the base to 873 m at the summit, a net gain of 255 m at an average gradient of 6.31%. That average sits firmly in category-3 territory, but the number that matters most is the maximum: 9.44%. This is not a climb you can drift up. It is steep enough to sting, short enough to tempt you into going too hard, and precisely the kind of effort that rewards a rider who reads the road well.

How the Gradient Unfolds

The defining feature here is the gap between the average and the maximum. A 6.31% mean with a 9.44% peak tells you the climb is not evenly graded — there are stretches noticeably shallower than the average and pitches that ramp up well beyond it. The recorded total ascent of 238 m is slightly less than the net gain of 255 m, which points to a road that mostly climbs but includes small easings or brief flatter shelves where the grade backs off before rearing up again. Expect the hardest ramps to land where the surface tilts toward that 9.44% ceiling, then relent just enough to let you recover before the next kick. Treat the shallow sections as rest, not as an invitation to accelerate.

Pacing Notes

At 4 km this is over quickly, so the temptation is to empty the tank early. Resist it. Anchor your effort to your FTP and hold a controlled, sustainable power through the opening kilometres, keeping something in reserve for the steepest ramps near that 9.44% maximum. A climb this short can be ridden slightly above threshold if your fitness allows, but only if you meter the surges rather than spiking on every pitch. If you are not sure what power you can sustain, run the numbers through the FTP estimator first, then set a target you can defend from base to summit. The rider who paces the steep sections evenly will always beat the one who blows up on the first ramp and crawls the rest.

Gearing

For a 4 km effort averaging 6.31% and spiking to 9.44%, gear for the ramps, not the average. A compact chainset paired with a wide cassette gives you the range to keep your cadence up when the road bites. A 34×32 will get most fit riders over the top comfortably, but if you carry any fatigue, ride at altitude, or simply prefer to spin, a 34×34 buys you that extra margin on the steepest pitches. Choosing the easier ratio costs you nothing on the shallower sections and protects your legs where the gradient peaks.

Summary

Puerto de Peña Betoño is a compact, spiky category-3 climb: short enough to attack, steep enough to punish a bad pace. Ride the flatter shelves as recovery, save your matches for the 9.44% ramps, and you will crest it strong.

Length: 4 km
Average gradient: 6.31%
Max gradient: 9.44%
Start: 618 m
Summit: 873 m
Net gain: 255 m
Total ascent: 238 m
Category: 3