Alto de Bombon

Alto de Bombon cycling climb profile

Alto de Bombon is a long, measured category 2 climb in Peru: 17.4 km from the start at 1126 m to the summit at 1919 m, with 793 m of net elevation gain. The average gradient is 4.57%, and the listed maximum is 6.69%, which tells you a lot about how this climb should be ridden.

This is not a climb defined by violent ramps. With the hardest gradient staying below 6.69%, the challenge is less about surviving isolated steep sections and more about resisting the temptation to ride too hard for too long. The road rises for long enough that an early overreach will not feel costly right away, but it will become expensive once the accumulated elevation starts to bite.

How the gradient unfolds

From the lower slopes, the profile should be approached as a steady aerobic climb. The average of 4.57% means the climb gives enough resistance to keep pressure on the pedals, but not so much that it naturally forces a low-gear survival rhythm. That is exactly what makes it easy to misjudge.

The maximum gradient of 6.69% suggests any harder sections are still controlled rather than decisive. Instead of needing repeated accelerations, the better ride is built around smooth power, stable cadence, and avoiding unnecessary surges. If the road briefly lifts toward the maximum, it should be absorbed with a small gear change rather than a big effort spike.

The elevation gain is substantial enough to make pacing matter. Over 17.4 km, even a moderate gradient becomes a meaningful endurance test, especially if you ride the opening kilometres like they are just a false flat. Treat the climb as one continuous effort from the base, not as a series of short steps.

Pacing and gearing notes

For most riders, the right strategy is to sit just under sustainable climbing intensity early, then reassess once the summit is materially closer. If you use /glossary/ftp as a pacing anchor, this is the type of climb where riding slightly below threshold at the start often beats chasing a target that looks manageable on paper.

Gearing should favour cadence control rather than bailout capacity for extreme gradients. You still want enough range to stay seated and smooth when the road approaches its steepest listed pitch, but the bigger risk is not being under-geared. It is grinding too early, loading the legs, and turning a steady category 2 ascent into a slow fade.

A good ride on Alto de Bombon will feel almost restrained in the first half. Let the average gradient do its work, keep the effort even, and only increase pressure once you are confident the climb has not quietly taxed more than expected.