Karakoram Pass

Overview

Karakoram Pass is short on paper and enormous in effect. It measures just 2.6 km with an average gradient of 6.8%, numbers that would read as a warm-up almost anywhere else. What sets this climb apart is where it happens: you begin at 5048 m and finish at 5226 m. That places the entire effort in the kind of thin air where oxygen is scarce and every pedal stroke costs more than the gradient alone suggests. With a category 3 rating, the climbing itself is moderate, but the altitude quietly turns a modest ramp into a genuine challenge.

The net elevation gain is 178 m over the 2.6 km, and the total ascent tallies 160 m once you account for the shape of the road. The difference between those two figures — 18 m — tells you the climb runs almost entirely uphill, with very little false flat or descending to break the rhythm.

How the Gradient Unfolds

At 6.8% average, Karakoram Pass sits in the steady-tempo band, but it does not hold that number the whole way. The max gradient of 9.98% marks the single hardest pitch, a ramp that pushes well past the average and demands a shift in effort. Because the climb is only 2.6 km long, that steep section arrives quickly and passes just as fast — there is no long runway to settle into before the road tilts. Expect a compact, front-loaded feel: get on top of the gear early, absorb the 9.98% pinch when it comes, and hold form as the gradient eases back toward the 6.8% average for the run to the summit at 5226 m.

Pacing Notes

Pace this climb by feel as much as by power. At over 5000 m, your sustainable output drops noticeably, so the wattage you'd normally hold on a 6.8% grade will feel harder than the display suggests. Anchor your effort to your FTP, but expect to ride below your usual climbing percentage of it because the altitude taxes recovery between surges. If you don't know your current number, run it through the FTP estimator before you plan the effort. On the 9.98% max pitch, allow a brief, controlled overshoot, then settle back — with only 2.6 km to cover, you can spend a little and still recover before the top.

Gearing

Gear for the altitude, not just the gradient. On paper a 6.8% average over 2.6 km is manageable, but thin air means you'll want a bailout gear to keep cadence high without spiking your heart rate. A compact 34-tooth chainring paired with a 34×32 low is the sensible baseline here, giving you room to spin through the 9.98% max without grinding. If you tend to climb at a higher cadence or you're carrying fatigue into the effort, drop to a 34×34 — the extra range is cheap insurance when oxygen is the limiter and every hard pitch feels steeper than it is.

Summary

Karakoram Pass proves that a climb doesn't need to be long to be memorable. In 2.6 km it delivers a steady 6.8% average, a sharp 9.98% max, and — most of all — the rarefied air of a 5226 m summit. Ride it with respect for the altitude, gear low, and let the numbers guide a controlled effort.

Length: 2.6 km
Average gradient: 6.8%
Max gradient: 9.98%
Start: 5048 m
Summit: 5226 m
Net gain: 178 m
Total ascent: 160 m
Category: 3