Grießbachjöchl - Passo di Gries

Overview

The Grießbachjöchl - Passo di Gries is a monster of a climb, and its numbers make no apology for it. At 23.6 km long with an average gradient of 7.24%, this is a genuine hors catégorie (HC) effort — the hardest classification there is, sitting above categories 1, 2, 3 and 4. You start at 865 m and grind all the way to a summit of 2576 m, banking 1711 m of net elevation gain along the way. The total ascent comes in at 1667 m, meaning the road climbs almost every metre it can without meaningful respite.

This is not a climb you attack. It is a climb you survive, then master.

How the Gradient Unfolds

A 7.24% average sustained over 23.6 km is a brutal proposition. To put it in perspective, holding that gradient without pause would demand roughly the full 1711 m of gain spread evenly across the distance — and the total ascent of 1667 m confirms there is very little descending or flat to hide in. What downhill exists is negligible; the difference between net gain and total ascent is tiny, which tells you the profile points relentlessly upward.

Expect the effort to feel front-loaded in your legs even if the road stays honest. Over 23.6 km, small variations around that 7.24% mean will feel enormous — a stretch two points steeper turns the screw hard, while anything shallower is pure relief. The thin air near the 2576 m summit compounds everything: the final kilometres cost more than the numbers alone suggest.

Pacing Notes

The golden rule on a climb this long is to ride within yourself early. With 23.6 km ahead, going into the red in the opening ramps is a mistake you cannot unwind. Anchor your effort to your FTP and aim to sit just below threshold for the bulk of the ascent, saving any surges for when you can see the summit.

If you do not know your threshold power, run the numbers through the FTP estimator before you plan your day. Knowing that figure transforms a 1711 m guessing game into a controlled, repeatable effort — you will know exactly what wattage you can hold for the better part of an hour or more, and you can pace the full 23.6 km accordingly.

Gearing

Do not under-gear this one. A 7.24% average over 23.6 km, climbing to 2576 m, rewards a wide-range cassette and a compact chainset. A 34×32 is the sensible baseline for strong climbers who can hold a steady tempo, but for most riders — especially anyone tackling this on tired legs or at altitude — a 34×34 gives you the extra spin to keep cadence high and torque low over the long haul. When the summit is still 1711 m of gain away, the ability to twiddle rather than grind is what keeps your legs alive.

Summary

The Grießbachjöchl - Passo di Gries is a true HC test: long, steep and unrelenting from 865 m to 2576 m. Respect the distance, pace to your threshold, and gear low enough to keep turning the pedals. Do that, and 23.6 km of 7.24% becomes an achievement rather than an ordeal.

Length: 23.6 km
Average gradient: 7.24%
Max gradient: n/a
Start: 865 m
Summit: 2576 m
Net gain: 1711 m
Total ascent: 1667 m
Category: HC