Alto del Cural

Alto del Cural cycling climb profile

Alto del Cural is a substantial Colombian Category 1 climb: 17.9 km from bottom to summit, rising from 233 m to 1340 m for a listed net elevation gain of 1107 m. The average gradient is 6.18%, which puts it in that dangerous middle ground where the climb is not brutally steep all the way, but is long enough that poor pacing compounds quickly.

The key number is not just the average. The maximum gradient is 21.38%, which tells you this is not a smooth metronomic ascent where one gear and one rhythm solve the problem. A climb can average just over 6% and still punish riders if the gradient arrives in uneven waves. On Alto del Cural, the practical expectation should be a sustained aerobic climb with severe pitch changes that force repeated decisions: stay seated and absorb the torque, shift early and protect cadence, or stand briefly to get over the steepest ramps without flooding the legs.

How the gradient rides

From the start elevation of 233 m, the climb gains height for nearly 18 km before reaching 1340 m. That distance matters. At 6.18%, the baseline demand is already high enough that riding above threshold early will come back hard before the summit. The presence of a 21.38% maximum gradient changes the character of the effort further. The climb is not only about holding power. It is about managing the moments when the road tilts well beyond the average and your cadence can collapse if the gearing is too ambitious.

Because the maximum gradient is more than three times the average, the slope has to vary meaningfully across the ascent. That means the smarter ride is not to chase a perfectly even speed. Speed will fall sharply on the steepest pitches and recover where the road eases. Power, breathing, and cadence are better guides than pace.

Pacing and gearing notes

Treat the first part of the climb as setup, not as a place to prove form. For a 17.9 km ascent, riding the opening too hard narrows your options later, especially when ramps approach the maximum gradient. If you know your /glossary/ftp, anchor the early effort below the level you could only sustain for a short climb, then let intensity rise only when the gradient forces it.

Gearing should be chosen for the steepest parts, not the average. A setup that feels efficient at 6% can become a liability when the road pitches above 20%. If your lowest gear still requires a grinding cadence on those ramps, the physiological cost rises quickly: higher torque, more muscular fatigue, and less ability to settle back into rhythm once the road eases.

The cleanest strategy is conservative and disciplined:

• Start below the effort that feels exciting.
• Shift before the steep ramps, not after cadence has already stalled.
• Let speed vary while keeping effort controlled.
• Save standing efforts for short steep sections, not as a default style.
• Reassess effort late, once the long elevation gain is mostly behind you.

Alto del Cural is hard because the numbers pull in two directions. The 6.18% average invites a steady tempo approach, but the 21.38% maximum demands respect. Ride it like a long climb with sharp teeth: controlled early, flexible through the ramps, and geared low enough that the steepest sections do not decide the entire ascent for you.