Alto del Pozo

Alto del Pozo cycling climb profile

Alto del Pozo is a category 1 climb in CO that asks for restraint more than aggression. On paper, the defining figure is its length: 39.5 km from a start elevation of 717 m to a summit elevation of 2413 m. The average gradient is 4.3%, with 1696 m of net elevation gain and 1713 m of total ascent.

That combination matters. The total ascent is only slightly higher than the net elevation gain, which points to a climb that is mainly about persistent upward pressure rather than repeated losses and gains. It is not just a ramp to survive. It is a long aerobic load that keeps pulling on the pedals until the summit.

How the gradient unfolds

The average of 4.3% can make Alto del Pozo look more manageable than it will feel once the distance starts to accumulate. A climb of 39.5 km at that gradient rewards riders who can sit in a controlled rhythm and avoid burning matches early. The max gradient of 9.04% is not extreme in isolation, but it is sharp enough to punish anyone who has been riding the average as if it were the whole story.

The practical read is straightforward: most of the climb should be paced as a steady endurance-to-tempo effort, with enough reserve to absorb steeper sections near the max gradient without spiking deep above /glossary/ftp. The danger is not one savage wall. The danger is letting a moderate gradient convince you to ride too hard too soon.

Pacing strategy

Treat Alto del Pozo as a climb where the first priority is keeping the effort boringly sustainable. If you are riding by power, avoid chasing short surges and let the gradient changes come to you. If you are riding by feel, your breathing should stay controlled early, because the climb gives you a long time to pay for any mistake.

The key is to separate speed from effort. On a climb this long, headwinds, road surface, and small changes in slope can all make the bike feel inconsistent. The correct response is not to force the same speed. Hold the same pressure, keep cadence stable, and save the harder work for the moments when the gradient approaches 9.04%.

Gearing notes

Do not gear Alto del Pozo only for its 4.3% average. That number describes the full climb, not the hardest moments. You need a climbing gear that lets you stay seated and smooth when the slope steepens, especially late in the ascent when fatigue makes every change in gradient feel larger.

A sensible setup is one that keeps cadence from collapsing on the steepest ramps while still allowing efficient riding on the steadier sections. If you are choosing between a proud gear and an easier one, take the easier option. On a 39.5 km climb with 1713 m of total ascent, preserving muscular freshness is not conservative - it is the fastest way to keep producing power all the way to 2413 m.