Chasseral Pass

Overview

Chasseral Pass is a Category 1 climb in Switzerland, running 10.5 km up to the ridge of the Jura. It gains 701 m of net elevation, starting at 798 m and topping out at 1499 m. On paper it reads as a steady mid-length ascent at 6.69% average, the kind of effort that rewards a rider who can hold a rhythm.

That average is only part of the story. The total ascent is 1024 m, which is 323 m more than the net gain. That gap is undulation: the road gives some elevation back and forces you to reclaim it. Every metre you descend mid-climb is a metre you have to earn twice, so the actual pedaling load is meaningfully higher than the 701 m net figure suggests. Plan for the total, not the net.

How the Gradient Unfolds

A 6.69% average smooths over a road that does not climb at a constant rate. With 323 m of extra ascent baked in, expect the grade to swing well above and below the mean rather than settle at it. The steep pitches are where the climb is decided, and the maximum ramp is far harsher than the average.

• Flatter and false-flat recovery sections where you can shift up and spin
• Repeated short kicks that reset your rhythm and spike your power
• Brief descents that hand back elevation you then have to reclaim
• A steepest ramp that sits well into double-digit gradient

Pacing Notes

On a smooth climb you can ride even-effort and let speed take care of itself. Chasseral's undulation breaks that. If you chase even speed, you will surge on every kick and blow up. Instead, anchor your pacing to a target sustainable power output and let your speed rise and fall with the grade. Ride the steep ramps a touch above target and back off on the false flats to even out the average.

Know your numbers before you start. Run the FTP estimator to set a realistic ceiling, then hold your effort just below it on the sustained sections so you have headroom for the short, steep kicks.

Gearing

The steepest ramp governs your gearing choice here, not the average. With a maximum gradient well into the double digits, a standard chainset will leave you grinding. Fit a compact or sub-compact chainset paired with a wide-range cassette so you can keep your cadence up when the road bites. A 34x32 is a sensible minimum; 34x34 gives you more margin on the harshest pitch. Check your setup before the ride, not at the bottom of the climb.

Summary

• Length: 10.5 km
• Average gradient: 6.69%
• Maximum gradient: 18.21%
• Net elevation gain: 701 m
• Total ascent: 1024 m
• Category: 1

Chasseral Pass is a Category 1 climb whose difficulty lives in the 323 m gap between net gain and total ascent. Pace to power, gear for the steepest ramp, and treat the average as a floor rather than a promise.