Hochtannberg Pass

Overview

Hochtannberg Pass is a long-haul Category 1 ascent that rewards patience over punch. From a start elevation of 742 m, the road unspools for 20.1 km before topping out at 1677 m — a net elevation gain of 935 m and a total ascent of 923 m once the small dips and rollers are counted. The headline average gradient of 4.66% sounds gentle, and for long stretches it is. But that number flatters a climb that hides a 16.5% maximum pitch, a ramp steep enough to break any rider who has spent the lower slopes riding above threshold. This is a climb of rhythm and restraint, where the winner is whoever wastes the least energy over 20.1 km.

How the Gradient Unfolds

Do not trust the 4.66% average. On a climb this long, that figure is an accounting trick — the mean of shallow drags, flatter recovery sections, and at least one wall pitching to 16.5%. The gap between average and maximum is enormous, which tells you the gradient is uneven rather than relentless. Expect passages well below 4.66% where you can shift up and roll, punctuated by sharper kicks that force you back onto the drops. The 923 m of total ascent sitting just under the 935 m net gain confirms there is very little descending mixed in: this road climbs, eases, then climbs again, almost always trending upward. Read the road ahead and save something for the steep bite.

Pacing Notes

Over 20.1 km, pacing is everything. Anchor your effort to your FTP and treat the shallow sections as a chance to stay comfortably below it, banking energy for the 16.5% ramp rather than burning matches on the drags. A good target is to sit just under threshold on the sustained 4.66%-ish gradient and only briefly exceed it on the steepest pitch. If you do not know your current threshold, run the numbers through the FTP estimator before you start — a climb this long punishes riders who guess high and blow up before the summit. Even splits, or a slight negative split, will get you to 1677 m faster than an aggressive opening.

Gearing

Length plus a 16.5% spike means gearing for the worst moment, not the average. A compact 34-tooth chainring paired with a wide cassette is the sensible baseline here. For strong riders a 34×32 will just about cover the steep ramp while keeping cadence honest on the flatter drags. If you weigh more, fatigue late over 20.1 km, or simply prefer to spin, size up to 34×34 — that extra sprocket buys you the cadence to survive the 16.5% pitch without grinding to a halt. When in doubt on a 935 m climb, choose the easier gear; spinning beats stalling.

Summary

Hochtannberg Pass is a long, uneven Category 1 climb best ridden with a cool head: respect the 20.1 km distance, hold back on the 4.66% drags, and save your legs for the 16.5% wall. Gear low, pace to your threshold, and the 935 m to 1677 m will come.

Length: 20.1 km
Average gradient: 4.66%
Max gradient: 16.5%
Start: 742 m
Summit: 1677 m
Net gain: 935 m
Total ascent: 923 m
Category: 1