Alto del Telégrafo

Overview

Alto del Telégrafo is a long, sustained category 1 climb that asks for patience more than raw power. Over 21.2 km it lifts you from 890 m at the base to a 1961 m summit, a net gain of 1071 m. The average gradient reads a modest-sounding 5.06%, but that headline figure hides the truth of a climb this long: nearly 22 kilometres of continuous uphill is a serious day's work regardless of how gentle the mean looks on paper. The total ascent of 1066 m confirms this is an almost purely upward road with little in the way of relief.

How the Gradient Unfolds

The defining tension of Telégrafo is the gap between its 5.06% average and its 14.5% maximum. That spread tells you the climb is not evenly pitched. Long stretches will sit at or below the average, letting you find a rhythm, while isolated ramps spike toward that 14.5% ceiling and force sudden, sharp efforts. With a net gain of 1071 m against a total ascent of 1066 m, the road climbs relentlessly in one direction — there are essentially no descents to recover on. Expect the harder pitches to punctuate otherwise steady gradients rather than cluster into one wall, so the challenge is managing repeated changes in effort across a very long distance.

Pacing Notes

On a climb of 21.2 km, discipline beats bravado. Set your effort against your FTP and hold something in reserve — the length here punishes anyone who burns matches early. Because the average is 5.06% but ramps reach 14.5%, plan to absorb the steep sections by easing slightly before them and spinning through, rather than surging. If you are unsure of your threshold, run the numbers through the FTP estimator first so your target power reflects reality, not optimism. Over 1071 m of climbing, a steady sub-threshold effort that you can sustain for the full ascent will beat a fast start every time.

Gearing

Length plus a 14.5% maximum makes gearing a real decision. For most riders a compact 34-tooth chainring paired with a wide cassette is the sensible baseline. A 34×32 will handle the bulk of the 5.06% average comfortably and cover most of the steeper ramps if your legs and threshold are strong. But given the climb runs 21.2 km and gains 1071 m, fatigue makes those 14.5% pitches feel steeper the deeper you get — so if you have any doubt, fit a 34×34. The extra cog preserves cadence on the sharp sections and keeps your effort sustainable all the way to 1961 m. When in doubt on a climb this long, choose the easier gear.

Summary

Alto del Telégrafo rewards steady, well-fuelled climbing over 21.2 km of near-continuous ascent. Pace to your threshold, gear low enough to spin the ramps, and let the summit come to you.

Length: 21.2 km
Average gradient: 5.06%
Max gradient: 14.5%
Start: 890 m
Summit: 1961 m
Net gain: 1071 m
Total ascent: 1066 m
Category: 1