Pragel Pass

Overview

Pragel Pass is a Category 1 climb in Switzerland, running 11.2 km from a start elevation of 582 m to a summit at 1490 m. On paper that is a net elevation gain of 908 m at an average gradient of 8.12% — firmly in the range where a climb stops being a long tempo effort and becomes a genuine test of sustained climbing.

But the net figure understates the work. The total ascent over the climb is 1171 m, which is 263 m more than the net gain. That gap is undulation: the road gives elevation back in places, forcing you to re-climb it. Every metre handed back has to be re-earned, and those re-climbs almost always come at gradients steeper than the average. Budget for a climb that feels harder than 908 m, because in the pedals it is closer to 1171 m of vertical.

How the Gradient Unfolds

The 8.12% average is a blend, not a constant. A single average smooths over flatter linking sections and the sharp ramps that push the maximum gradient to 27.69% — a pitch steep enough to force you out of the saddle regardless of how you paced the approach. The undulation confirmed by the ascent numbers means the profile is not a clean staircase; it climbs, releases, and climbs again.

Expect across the profile:

• Flatter or descending recovery sections where the road gives back elevation — do not coast, keep tension in the chain
• Repeated short climbs that re-take the elevation you just lost, typically above the average gradient
• A steepest ramp at 27.69% that will spike your power and cadence no matter your plan

Pacing Notes

On an undulating climb like this, even-effort beats even-speed. Chasing a constant speed forces you deep into the red on every steep re-climb and lets you freewheel the flatter parts, wasting the recovery. Anchor your pacing to a target sustainable power output instead, and hold it through both the ramps and the flatter linking sections.

Practically, that means letting your speed sag on the 27.69% pitch while your power stays capped, then keeping the same power — not the same speed — where the road eases. If you have not set your zones recently, run the numbers through the FTP estimator before you commit to a target for the full 11.2 km.

Gearing

A maximum gradient of 27.69% governs your gearing choice, not the 8.12% average. On pitches that steep, a standard compact alone will leave you grinding or walking. Fit a compact or sub-compact chainset paired with a wide-range cassette — think 34×32 or 34×34 as a floor — so you keep a spinnable cadence on the steepest ramp instead of mashing a gear that blows your legs apart. Check your setup before the ride; discovering you are under-geared on a 27.69% wall is not a mid-climb problem you can fix.

Summary

• Length: 11.2 km
• Average gradient: 8.12%
• Maximum gradient: 27.69%
• Net elevation gain: 908 m
• Total ascent: 1171 m
• Category: 1

Pragel Pass is a Category 1 climb that punishes anyone who plans only for the net gain. Pace to power, gear for the 27.69% ramp, and respect the 263 m of hidden re-climbing, and the summit at 1490 m is well within reach.