Alto de Arrayan

Alto de Arrayan cycling climb profile

Alto de Arrayan is an HC climb in Colombia that asks a simple but unforgiving question: can you hold a controlled effort for 13.7 km while the road averages 8.67% and still have something left for the steepest ramps?

The climb starts at 992 m and tops out at 2183 m, giving it a net elevation gain of 1191 m. That vertical gain over this distance is the key detail. This is not a climb where the average is inflated by one savage wall and then softened by long easy sections. An 8.67% average across 13.7 km means the baseline effort is already high before the road touches its maximum gradient of 18.04%.

How the gradient rides

With only the headline profile available, the safest read is to treat Alto de Arrayan as a sustained climbing effort from bottom to summit rather than a climb with predictable recovery points. The numbers do not give enough detail to place the steepest ramp in a specific sector, but the gap between the average gradient and the 18.04% maximum matters tactically.

That tells you the climb likely contains moments where rhythm breaks. Even if those pitches are short, they will force a choice: surge over them and pay later, or shift early, protect cadence, and keep the effort close to target. On a climb this long, the second option is usually the faster one unless you are racing a direct move.

The most important pacing mistake is starting as if the first few minutes define the climb. They do not. The average gradient means the early section should feel almost too controlled. If you are already above threshold before the road has properly settled in, the upper half becomes damage control rather than climbing.

Pacing and gearing notes

Use /glossary/ftp as the anchor, but do not ride it like a short threshold test. For most riders, the right strategy is a firm sub-threshold start, then a gradual lift only once the summit is realistically within range.

Practical approach:

• Start seated and conservative, especially while the legs are adapting to the constant gradient.
• Shift before the steepest ramps rather than after cadence collapses.
• Keep one easier gear available for the 18.04% maximum sections.
• Avoid repeated standing accelerations unless the road forces them.
• If using power, cap early surges and let speed vary with gradient.

A compact or climbing-focused setup makes sense here because the average gradient is already demanding and the maximum pitch is steep enough to expose over-gearing. The goal is not to make every ramp feel easy. It is to avoid turning the steepest sections into anaerobic efforts that compromise the final kilometers.

Alto de Arrayan rewards patience more than aggression. Ride the first half like the climb is longer than it is, respect the ramps, and use the final portion to spend what you saved.