Gampen Pass

Overview

Gampen Pass is a genuine hors catégorie test. Over 14.6 km the road climbs from 280 m at its base to 1526 m at the summit, a net gain of 1246 m and a total ascent of 1224 m once the small rolling sections are counted. The headline figure is the average gradient: 8.54% sustained for the full distance. That is not a climb with a token steep pitch bolted onto an easy road — it is steep more or less everywhere, and the 15.71% maximum tells you the hardest ramps punish anyone who has misjudged the opening kilometres.

How the Gradient Unfolds

An 8.54% average across 14.6 km means the climb almost never lets you freewheel. With a maximum of 15.71%, the steepest ramps sit nearly double the mean, so the difficulty is not evenly spread — expect stretches noticeably shallower than 8.54% to balance the pitches that spike toward 15%. The shape is defined by that contrast: long grinding sections where you settle into a rhythm, broken by walls that force you out of the saddle or down a gear. Because the net gain (1246 m) exceeds the total ascent (1224 m) only marginally, there is essentially no meaningful downhill respite. Every metre of the 1246 m separating base from summit is earned climbing.

Pacing Notes

On a climb this long and this steep, pacing is everything. The single biggest mistake is attacking the lower slopes and detonating before the 15.71% ramps arrive higher up. Anchor your effort to your FTP rather than to how you feel in the first kilometre, when adrenaline masks the cost. A sustainable target for a 14.6 km HC effort is a climbing power you can hold to the top without fading — for most riders that sits at or just below threshold, with the steepest pitches allowed to nudge briefly above.

If you do not know your threshold number, work it out first with the FTP estimator and build your plan around it. Ride the shallower sections steadily and save a little for the walls, rather than the reverse.

Gearing

At 8.54% average with a 15.71% maximum over 14.6 km, this is a climb where under-gearing wrecks your day. A compact chainset paired with a wide-range cassette is the sensible baseline. A 34×32 will get most fit riders to the 1526 m summit, but on the steepest ramps it leaves little room to spin. For anyone carrying fatigue, extra weight, or simply wanting to protect their legs across 1246 m of climbing, a 34×34 is the smarter choice — the lower ratio keeps your cadence up on the 15% pitches and preserves your threshold effort for the whole 14.6 km.

Summary

Gampen Pass is a climb that rewards discipline and punishes bravado: long, unremittingly steep, and topped out well above where the air starts to thin. Pace it to your threshold, gear it low, and respect the 15.71% ramps and the full 14.6 km will feel like an achievement rather than a survival exercise.

Length: 14.6 km
Average gradient: 8.54%
Max gradient: 15.71%
Start: 280 m
Summit: 1526 m
Net gain: 1246 m
Total ascent: 1224 m
Category: HC