Alto del Burro

Alto del Burro cycling climb profile

Alto del Burro is a compact but demanding category 2 climb in Colombia, and the headline number tells most of the story: 5 km at an average gradient of 8.47%. That is steep enough that the climb never really gives back momentum. It is not a long mountain effort, but it is long enough that riding it like a short hill repeat will come back hard in the final kilometres.

The road starts at 2,097 m and rises to 2,523 m, with 426 m of net elevation gain. That vertical gain packed into only 5 km is what makes the climb feel more selective than its distance suggests. The maximum gradient of 13.37% also matters tactically. Even without a kilometre-by-kilometre breakdown, that peak tells you the climb is not simply a smooth, metronomic drag. There are steeper sections where cadence can collapse if the gearing is too ambitious or the pacing is too optimistic.

How the gradient rides

The average of 8.47% should be treated as the baseline effort, not the hard part. On a climb this short, the danger is riding the opening minutes as if the gradient will stay predictable, then being forced above threshold when the road kicks toward its 13.37% maximum.

A sensible approach is to ride the lower slopes at a controlled tempo, keeping enough margin for the steepest ramps. If using power, the early target should sit below the effort you could hold for a clean 5 km climb at full commitment. The reason is simple: any section above 10% increases torque demand, and once cadence drops, the cost of every acceleration rises. For riders pacing by feel, the first half should feel firm but contained, not like a race-winning move.

Pacing and gearing notes

Choose gearing for the 13.37% maximum gradient, not the 8.47% average. If the easiest gear only works when fresh, it is not low enough for a controlled ride over the full climb. A compact setup or wide-range cassette will help keep cadence from grinding down on the steepest pitches.

For training, Alto del Burro is well suited to a sustained climbing interval around /glossary/ftp with short surges forced by the steeper ramps. For a race effort, the winning move is likely not one explosive acceleration from the bottom, but a progressive ride that keeps pressure on through the middle of the climb and uses the steeper sections to expose riders who overgeared or started too hard.

The practical takeaway is clear: respect the average, gear for the maximum, and save enough control to ride the last kilometre with form rather than survival.