Platschjoch

Overview

Platschjoch is an HC monster — hors catégorie, the hardest rating there is, and it earns every letter. Over just 14.2 km the road hauls you from a valley floor at 672 m to a summit at 2099 m, a net gain of 1427 m. The headline number is the one that will haunt you: an average gradient of 10.02% sustained across the full 14.2 km. This is not a climb with a false flat to hide behind. Averages this steep over a distance this long put Platschjoch among the most punishing paved ascents anywhere, and the 26.19% max pitch tells you the road is willing to get personal.

How the Gradient Unfolds

An average of 10.02% means the climb almost never relents. Where a milder pass lets the gradient sag into the low single digits, here even the "easy" sections hover around double figures. The total ascent of 1417 m against a net gain of 1427 m tells you something useful about the shape: there is barely any downhill or flat to give the legs a break, so nearly all your climbing is pure, one-directional grind. The 26.19% max gradient marks the wall — a ramp steep enough that momentum evaporates and cadence collapses. Expect the road to lean hardest in short, savage kicks rather than one endless slope, but never expect a genuine recovery pitch. Plan your effort around the reality that the average IS the ramp.

Pacing Notes

On a climb averaging 10.02% for 14.2 km, pacing discipline decides everything. Anchor your effort to a percentage of your FTP rather than to speed — at these gradients your velocity will feel demoralisingly slow no matter how hard you push, so watts and heart rate are your only honest guides. Aim to sit just below threshold on the steady sections and accept short surges above it on the 26.19% pitches, where staying upright demands raw torque. If you do not know your threshold, estimate it first with the FTP estimator and set a ceiling you can hold for the roughly hour-plus this ascent will demand. Go too deep in the first third and the back half of those 1427 vertical metres will break you.

Gearing

Do not under-gear this one. With a 10.02% average and ramps to 26.19%, most riders should bring the easiest setup they can fit. A compact 34-tooth chainring paired with a 32-tooth sprocket — 34×32 — is the sensible floor for strong climbers. For most people, and for anyone carrying fatigue or luggage, go further: a 34×34 buys you the extra cadence that keeps knees and morale intact when the road hits its steepest walls. If your frame accepts an even wider cassette, take it. Spinning a low gear beats grinding a high one to a standstill.

Summary

Platschjoch is a pure test of climbing endurance: relentless gradient, minimal respite, and a summit deep into thin air. Respect the average, gear low, pace by power, and it becomes a triumph rather than a survival crawl.

Length: 14.2 km
Average gradient: 10.02%
Max gradient: 26.19%
Start: 672 m
Summit: 2099 m
Net gain: 1427 m
Total ascent: 1417 m
Category: HC