Carmennapass

Overview

Carmennapass is a Category 1 climb in Switzerland, running 18.4 km from a start elevation of 1209 m to a summit of 2369 m. Over that distance it delivers a net elevation gain of 1160 m at an average gradient of 6.3%. That places it firmly in the tier of climbs that reward preparation: long enough to demand real pacing discipline, high enough to sit deep in alpine terrain, and steep enough on average to keep you honest for well over an hour.

The number that matters most here is the gap between the net gain and the total ascent. You climb 1160 m net, but the total ascent is 1947 m — meaning roughly 787 m of the vertical you gain is given back and re-climbed along the way. That undulation is not incidental. It tells you the road repeatedly kicks up and drops, so the true climbing effort is well above what the net figure suggests. Plan for the total ascent, not the net.

How the Gradient Unfolds

The 6.3% average is a blend, not a description of the road under your wheels at any given moment. With 787 m of re-climbing baked in, the profile swings between pitches far steeper than 6.3% and sections that flatten out or descend to recover the balance. Riding to the average is a trap: you will be over-geared on the ramps and coasting on the dips.

Expect the following across the profile:

• Flatter and recovery sections where the road eases or briefly drops, letting you spin and reset.
• Repeated short climbs stacked back to back, each one adding to the 1947 m total ascent.
• A steepest ramp noticeably harder than the average, where gearing and composure decide your day.

Pacing Notes

On a smooth, steady climb you can hold even effort and let speed take care of itself. Carmennapass is not that climb. Because of the undulation, chasing even speed forces you to spike hard over every rise, burning matches you will want back later. Instead, hold a steady sustainable power output through the steep pitches and accept that your speed will rise and fall with the terrain.

Let the flatter and descending sections be genuine recovery — ease off rather than pushing to "make time." Anchor your target to your own numbers by running the FTP estimator before the ride, then cap yourself on the ramps so you arrive at the 2369 m summit with something left.

Gearing

Gear for the steepest ramp, not the average. On a climb this long with sharp repeated pitches, a compact or sub-compact chainset paired with a wide-range cassette is the sensible choice — something like a 34×32 or 34×34 gives you the low end to keep cadence up when the road bites. Check your setup before the ride: confirm your smallest chainring and largest sprocket actually cover the steep sections, because grinding a too-big gear over 18.4 km of undulation is how a manageable climb turns into a survival exercise.

Summary

• Length: 18.4 km
• Average gradient: 6.3%
• Net elevation gain: 1160 m
• Total ascent: 1947 m
• Category: 1

Carmennapass is a long Category 1 effort where the net gain undersells the work. Respect the 1947 m of total ascent, pace to power through the ramps, and gear low — do that, and the 18.4 km to 2369 m becomes a climb you finish strong rather than merely survive.