Krimmler Tauern

Overview

Krimmler Tauern is a proper hors catégorie test — the kind of climb that rewards patience and punishes ego. Over its full 27.2 km it lifts you from a valley floor at 766 m to a lofty 2508 m summit, a net elevation gain of 1742 m. That is a climb long enough to reshape your whole day: at a 6.41% average gradient, there is no false flat coasting to hide behind, and the total ascent of 1830 m confirms the road is not simply pointing up in a straight line — there is more gain in it than the net figure alone suggests, meaning brief dips and rolls that you pay back with interest.

At 2508 m the summit sits high enough that thinning air becomes a real factor in the final third. Combined with the HC classification, this is one of the harder sustained ascents you can point a road bike at.

How the Gradient Unfolds

The headline number is 6.41%, but averages flatten the story. With a maximum pitch of 18.56%, this road clearly stacks its steepest ramps somewhere along the way — and an 18.56% wall is steep enough to force you out of the saddle regardless of how fresh your legs feel.

The gap between the 1742 m net gain and the 1830 m total ascent — a difference of 88 m — tells you the profile is not perfectly monotonic. Expect short reprieves where the grade eases, followed by renewed climbing. Over 27.2 km that rhythm matters: the flatter sections are where you recover, and the ramps toward that 18.56% max are where the climb is won or lost.

Pacing Notes

On a climb this long, discipline beats bravado. Your single most useful reference is your FTP — hold yourself just under it on the sustained 6.41% stretches and save your matches for the steep ramps approaching 18.56%. Blow up early on a 27.2 km ascent and there is a very long way still to suffer.

If you don't have a recent power number, estimate one first with the FTP estimator, then set a ceiling you can defend for well over an hour. As you climb toward 2508 m, remember that altitude quietly trims your sustainable output — pacing that feels conservative at 766 m may be exactly right near the top.

Gearing

Gear for the ramps, not the average. A 6.41% mean is manageable, but the 18.56% max and the sheer 1742 m of climbing mean you want spin, not grind. A compact 34-tooth chainring paired with a wide-range cassette is the sensible baseline: a 34×32 will get most riders up the sustained sections comfortably, while a 34×34 gives you the extra rescue gear for the steepest pitches and for the final kilometres near 2508 m when fatigue and thin air stack up. If your legs or your loaded bike suggest otherwise, err toward the easier 34×34 — over 27.2 km, cadence is your friend.

Summary

Krimmler Tauern is a long, high, honest HC climb: 27.2 km, a 6.41% average, and a summit at 2508 m that earns every metre of its 1742 m net gain. Pace it with your FTP, gear it for the 18.56% ramps, and let the road come to you.

Length: 27.2 km
Average gradient: 6.41%
Max gradient: 18.56%
Start: 766 m
Summit: 2508 m
Net gain: 1742 m
Total ascent: 1830 m
Category: HC