Papallacta Pass

Overview

Papallacta Pass is a compact, high-altitude effort: just 1.9 km long, but with an average gradient of 7.24% that keeps the pressure on from the first pedal stroke to the last. You start at 3291 m and top out at 3428 m, a net gain of 137 m over a road that never really lets you settle. At under two kilometres, this is the kind of climb you can commit to fully — there is no reward for holding back, and no long middle section in which to recover. The category 4 rating reflects its brevity rather than any easiness; the numbers per metre are respectable, and the thin air at these elevations makes every watt cost more than it would at sea level.

How the Gradient Unfolds

The shape here is short and honest. With 1.9 km of road and a 7.24% average, the climb sits consistently in the range where a strong rider stays seated but never coasts. The 10.88% maximum tells you there is at least one pinch steeper than the average — likely a brief kicker where the road tilts up and forces a downshift or a few seconds out of the saddle. Because the total ascent (134 m) sits close to the net gain (137 m), there is essentially no descending or false-flat relief woven into the profile: almost every metre gained is a metre you climb and keep. That makes the effort feel steadier than a rolling climb of the same length — a single sustained push rather than a series of surges.

Pacing Notes

On a climb this short, pacing is about restraint at the base, not survival at the top. Aim to ride the opening ramp just under threshold, then spend whatever is left as the summit at 3428 m comes into view. Anchoring your effort to a known power number helps: riding the bulk of the climb close to your FTP keeps you from redlining on the 10.88% pinch and blowing the final stretch. If you do not have a recent test figure, use the FTP estimator to get a working number before you plan the effort. With only 137 m to gain, a single well-judged surge over the steepest section usually pays off — there is not enough road left afterward to punish an early mistake badly, but there is enough to reward a clean, controlled build.

Gearing

For a 7.24% average that spikes to 10.88%, most riders will want a compact setup with room to spin. A 34×32 low gear is enough for many to hold a steady cadence across the bulk of the climb, but if you prefer to sit and turn the pedals rather than grind on the steepest pinch — especially at this altitude, where oxygen is scarce — a 34×34 gives welcome extra margin. Choose based on your climbing style: 34×32 if you like to press a slightly bigger gear, 34×34 if you would rather protect your legs and keep the cadence high.

Summary

Papallacta Pass packs a genuine climbing effort into a small package: 1.9 km, a 7.24% average, and a 10.88% high point, all at breath-thinning elevation. Commit early, respect the pinch, and let the short distance work in your favour.

Length: 1.9 km
Average gradient: 7.24%
Max gradient: 10.88%
Start: 3291 m
Summit: 3428 m
Net gain: 137 m
Total ascent: 134 m
Category: 4