Penser Joch

Overview

Penser Joch is a hors catégorie (HC) climb — the hardest classification cycling has, sitting above categories 1 through 4. It stretches 22.3 km from a valley floor at 727 m up to a summit at 2198 m, delivering a net elevation gain of 1471 m. The total ascent registers 1452 m, meaning almost every metre of this road tilts upward with barely a breath of respite. The average gradient of 6.59% sounds civilised on paper, but averages flatten the truth: a maximum pitch of 25.8% waits somewhere on this mountain, and that single number reshapes how you approach the whole effort.

How the Gradient Unfolds

Do the arithmetic and the shape becomes clear. Gaining 1471 m of net elevation across 22.3 km is a long, sustained haul rather than a short, explosive wall. Yet the gap between the 6.59% average and the 25.8% maximum is enormous — nearly 19 percentage points of spread. That tells you the climb is not metronomic. Long stretches sit near or just above the average, banking steady altitude, while sharper ramps punctuate the ascent and force sudden surges in effort. The small difference between total ascent (1452 m) and net gain (1471 m) confirms there is little in the way of false flat or descent to recover on — you climb, and you keep climbing, for the better part of 22.3 km.

Pacing Notes

On a climb this long, discipline beats bravado. Anchor your effort to a percentage of your FTP and hold it, especially through the opening kilometres where fresh legs tempt you to overspend. If you do not know your threshold, run the numbers through the FTP estimator before you commit to a target. The danger on Penser Joch is the 25.8% maximum: on a pitch that steep, cadence collapses and power spikes involuntarily, so back off slightly on the approach to steeper sections and let the ramp — not your ego — set the pace. Averaging 6.59% over 22.3 km means the meter is always running; conserve early, spend late.

Gearing

With 1471 m to climb and a 25.8% maximum pitch, gear generously. A compact 34-tooth chainring paired with a 34×32 cassette gives most riders a workable floor for the sustained 6.59% grind, but the steepest ramp argues strongly for going lower still. A 34×34 setup buys precious extra cadence exactly where you need it, keeping you seated and spinning rather than grinding to a standstill on the wall. For a 22.3 km effort at HC difficulty, err toward the easier ratio — you will never regret having one more gear in reserve.

Summary

Penser Joch is a genuine HC test: long, relentless, and topped by a brutal 25.8% pitch. Pace it to your threshold, gear low, and respect the 22.3 km distance.

Length: 22.3 km
Average gradient: 6.59%
Max gradient: 25.8%
Start: 727 m
Summit: 2198 m
Net gain: 1471 m
Total ascent: 1452 m
Category: HC