Puerto de Tíscar

Overview

Puerto de Tíscar is one of those rare climbs where the numbers alone tell you to respect it. Over just 7.9 km it averages a savage 10.45%, hauling you from a start elevation of 459 m all the way to a 1282 m summit. That is a net gain of 823 m packed into under eight kilometres — the kind of ratio that earns an HC (hors catégorie) rating, the hardest classification there is before the scale drops down through categories 1 to 4. There is no easing in here. From the moment the road tilts up, it stays up, and the 24.96% maximum gradient lurking somewhere along the way means the hardest ramp is more than double the already-punishing average.

How the Gradient Unfolds

The defining feature of Tíscar is relentlessness. A 10.45% average across 7.9 km leaves almost no room for recovery flats — if there were long shallow sections, the steep pitches would have to be even more extreme to balance them out. Instead you get sustained double-digit gradients that grind at your legs kilometre after kilometre. The 24.96% maximum is the sting in the tail of that consistency: a wall that spikes to nearly a quarter grade, forcing you out of the saddle or into your lowest gear to keep the pedals turning. The net elevation gain of 823 m against a total ascent of 789 m confirms there is barely any descending or false flat to break the rhythm — the road climbs, and keeps climbing.

Pacing Notes

On a climb this steep, pacing is everything. At 10.45% average, going into the red early is a one-way ticket to a walk. Anchor your effort to a sustainable percentage of your FTP and resist the temptation to chase the opening ramps — the climb is 7.9 km long and the 24.96% maximum will demand a matched surge no matter how conservatively you start. If you do not know your threshold, run the numbers through the FTP estimator first so your target wattage is honest rather than hopeful. Meter your effort so you still have something left for the steepest pitch, then hold steady toward the 1282 m summit.

Gearing

Do not under-gear this one. With a 10.45% average and a 24.96% maximum, most riders will want the widest range they can get. A compact 34-tooth chainring paired with a 34×32 low gear is the sensible minimum for tackling the sustained gradients here, but given the 823 m of vertical over 7.9 km, stepping up to a 34×34 gives you the extra cushion that makes the steepest ramps survivable rather than heroic. If your bike accepts an even larger cassette, take it — spinning a low gear beats grinding to a stall on a 24.96% wall.

Summary

Puerto de Tíscar is short, savage and unrelenting: an HC climb that never lets you settle. Come with low gearing, a disciplined pacing plan, and respect for the wall waiting at the top.

Length: 7.9 km
Average gradient: 10.45%
Max gradient: 24.96%
Start: 459 m
Summit: 1282 m
Net gain: 823 m
Total ascent: 789 m
Category: HC