Alto de Las Cruces

Overview

Alto de Las Cruces is a Category 1 climb that asks a real, sustained effort without ever tipping into the brutal irregularity of a hors catégorie ascent. Over 10.4 km it lifts you from a start elevation of 816 m to a summit at 1471 m, a net gain of 655 m. The headline number is the average gradient: 6.29% held across the full length. That is steep enough to keep you honest for the better part of an hour, yet consistent enough that a well-judged rider can settle into rhythm and grind it out. With a max gradient of 8.89%, there are no wall-like ramps to shatter your pacing, only a firm, steady demand that compounds kilometer after kilometer.

How the Gradient Unfolds

The defining trait of Las Cruces is evenness. The gap between the 6.29% average and the 8.89% maximum is modest, which tells you the climb rarely strays far from its mean. There are no long false flats to recover on and no savage double-digit pitches to survive — the road simply tilts up and stays there. The listed total ascent of 630 m sits just below the 655 m net gain, confirming there is essentially no descending or flat respite mid-climb; almost every meter you gain, you keep. Practically, that means you should expect the steepest sections, brushing toward 8.89%, to arrive as gentle escalations rather than ambushes. Treat the whole 10.4 km as one continuous block of work rather than a sequence of distinct efforts.

Pacing Notes

On a climb this uniform, pacing is everything. Because the gradient barely deviates from 6.29%, your power output can stay remarkably flat too. Aim to hold a steady effort just below your threshold for the full 10.4 km rather than surging on the shallower stretches. A useful anchor is your FTP: riding Las Cruces at roughly 85–90% of it should be sustainable to the 1471 m summit if you start conservatively in the opening kilometers. If you do not know your number, run the FTP estimator first, then translate it into a target you can hold when the road nudges toward 8.89%. The classic error here is going out hard on the early slopes at 816 m and paying for it near the top — resist it.

Gearing

The steady 6.29% grade with an 8.89% ceiling makes gearing straightforward. A compact 34-tooth inner chainring paired with a wide cassette is the sensible default. For strong climbers, a 34×32 gives enough spin to keep cadence up through the firmer pitches without spinning out on the more moderate sections. If you weigh more, ride at endurance pace, or simply want insurance against fatigue late in the 10.4 km, a 34×34 buys you a little extra margin to keep the legs turning at the summit. Either way, prioritize a cadence you can sustain over raw gear-mashing strength.

Summary

Alto de Las Cruces rewards discipline: even gradient, no tricks, one long steady push to 1471 m. Pace it right, gear it low enough, and it becomes a satisfying rhythm climb rather than a suffer-fest.

Length: 10.4 km
Average gradient: 6.29%
Max gradient: 8.89%
Start: 816 m
Summit: 1471 m
Net gain: 655 m
Total ascent: 630 m
Category: 1