Alto del Rubio

Alto del Rubio cycling climb profile

Alto del Rubio is a category 4 climb in CL that looks modest on paper, but still rewards discipline. The climb is 6.6 km long, rising from 10 m to 211 m, with 201 m of net elevation gain and 202 m of total ascent. That near match between net gain and total ascent matters: this is not a sawtooth road padded with descents. It is essentially a steady uphill effort, even if the gradient itself is not severe for most of the climb.

The average gradient is 3.04%, which puts Alto del Rubio more in the sustained-tempo category than the survival-climb category. The key detail is the 8.49% maximum gradient. That spread between the average and the maximum tells you the effort is unlikely to feel completely uniform. Most of the climbing load should come from long, manageable uphill sections, but there are steeper moments where poor gearing or an overenthusiastic start can turn an otherwise controlled ascent into a messy one.

How it rides

The defining feature is the low overall gradient. At 3.04% across 6.6 km, this is a climb where speed stays relatively high, drafting can still matter if you are riding with others, and momentum is worth protecting. It is not steep enough to force a pure climbing rhythm from the first pedal stroke, so the danger is psychological: it can feel easy early, especially from a low starting elevation, and that encourages riders to drift above sustainable power.

The 8.49% maximum gradient changes the equation. Even if that steeper pitch is short, it will demand a real torque response. If you arrive there already riding above threshold, the climb can bite harder than its category 4 label suggests. The smart approach is to treat the opening as controlled pressure, not free speed.

Pacing and gearing

Ride Alto del Rubio as a steady aerobic-to-threshold climb, depending on your objective. If you are pacing from /glossary/ftp, the best execution is to stay smooth on the lower-gradient sections and save a small buffer for the steepest pitch.

Practical notes:

• Start slightly conservative, because the climb is long enough at 6.6 km for early overpacing to matter.
• Keep cadence fluid on the easier gradients rather than grinding a big gear for speed.
• Shift before the road steepens toward the 8.49% maximum, not after your cadence has already collapsed.
• If riding in a group, use the shallower gradient to stay sheltered, but avoid matching every acceleration.
• On a time-trial style effort, hold back just enough that the steepest section can be ridden seated and controlled.

Bottom line

Alto del Rubio is not defined by brutal average gradient. It is defined by the combination of a 6.6 km duration, a mild 3.04% average, and a maximum gradient sharp enough to punish sloppy pacing. The fastest ride here is likely the least dramatic one: controlled early, smooth through the middle, and geared well enough that the steepest ramp does not force an inefficient surge.