Cumberland Pass

Overview

Cumberland Pass is a Category 2 climb in the United States, running 8.9 km from a start elevation of 3,140 m to a summit at 3,666 m. Over that distance it delivers a net elevation gain of 526 m at an average gradient of 5.91%. On paper that reads as a steady, mid-length ascent — the kind of climb you can settle into and grind out at tempo.

The paper number is misleading. Total ascent on the climb is 668 m, 142 m more than the net gain. That gap tells you the road does not climb cleanly: it rises, gives some of it back, and rises again. Every metre you descend is a metre you have to re-climb, so the actual work you do is measurably higher than the elevation difference between base and summit suggests. Plan for the effort of a 668 m ascent, not a 526 m one.

How the Gradient Unfolds

The 5.91% average is a blend, not a constant. Because the profile undulates, stretches sit well below average and are offset by ramps well above it. The steepest pitch hits 17.23% — roughly three times the average — so the hardest moments arrive in short, sharp bursts rather than as a sustained wall.

• Flatter or gently descending sections where you can recover and carry speed
• Repeated short climbs that reset your effort each time the road tilts up
• A steepest ramp touching 17.23%, brief but demanding a real gear and a real surge

Pacing Notes

On an undulating climb like this, even-speed pacing is a trap: holding a constant speed forces your power to spike violently on every steep ramp and collapse on the flats. Instead, pace by even effort. Hold a steady sustainable power output through the whole climb, letting your speed rise on the shallow sections and fall on the steep ones. That keeps you off the red line where the 17.23% pitch would otherwise blow your legs.

If you do not know your ceiling, run the numbers through the FTP estimator first, then set your target for the climb a notch below it so you have headroom for the ramps.

Gearing

The 17.23% maximum is what dictates your setup. On pitches that steep, a standard chainset will leave you grinding a cadence that shreds your legs. Fit a compact or sub-compact chainset paired with a wide-range cassette — something like 34×32 or 34×34 — so you keep a spinnable gear when the road kicks up. Check your chainset and cassette before you ride; the summit at 3,666 m is not the place to discover you are over-geared.

Summary

• Length: 8.9 km
• Average gradient: 5.91%
• Maximum gradient: 17.23%
• Net elevation gain: 526 m
• Total ascent: 668 m
• Category: 2

Cumberland Pass is a Category 2 climb that asks more than its average suggests. Respect the 142 m of extra ascent, pace by effort rather than speed, and bring gearing built for that 17.23% ramp — do those three things and the climb rewards you.