Brotrinnl

Overview

Brotrinnl is a Category 1 climb in Austria, running 20.9 km from a valley floor at 825 m to a summit at 1854 m. Over that distance it delivers a net elevation gain of 1029 m at an average gradient of 4.92%. On paper that average reads as a steady tempo climb, the kind of number that lets you settle into a rhythm and hold it. The length alone earns the Category 1 label, and it is long enough that how you meter your effort in the first half decides how the last few kilometres feel.

The average, though, hides the real work. Total ascent on Brotrinnl is 1645 m against that 1029 m net gain — a 616 m gap. That difference is elevation you climb, give back on descents or false flats, then climb again. Undulation of this size means the true climbing gradient on the uphill pitches is steeper than 4.92%, and the recovery stretches are not free rest but ground you have to re-earn. Plan for the effort of a bigger climb than the net numbers imply.

How the Gradient Unfolds

A 4.92% average on an undulating profile is a blend of flat, downhill, and genuinely steep. The steep pitches are where the climb is won or lost, and the steepest ramp hits 25.86% — a wall that will drop you into your lowest gear regardless of how fresh you feel. Expect the gradient to swing widely rather than hold near the mean.

• Flatter and recovery sections where the road eases or tips downhill — use them, but don't coast the tempo away
• Repeated short climbs that account for the 616 m of extra ascent, each one asking for a surge
• The steepest ramp at 25.86%, short but severe — shift early and be ready before it arrives

Pacing Notes

On a climb this lumpy, chasing even speed is a trap: holding a fixed pace over the rollers forces you far over threshold on every ramp. Pace by even effort instead, letting speed rise on the shallow pitches and fall on the steep ones while power stays roughly constant. Anchor that effort to your sustainable power output and hold a margin below it early, because the undulation will repeatedly tempt you to overcook the ramps. If you don't know your number, run the FTP estimator before you go.

Gearing

The 25.86% maximum ramp governs your setup. Bring a compact or sub-compact chainset paired with a wide-range cassette — a 34×32 or 34×34 gives you a spinning gear for the steepest pitches without wrecking your legs. Check your chainset and cassette before the ride; discovering you're a gear short on a 25% wall is not a mid-climb problem you can fix.

Summary

• Length: 20.9 km
• Average gradient: 4.92%
• Maximum gradient: 25.86%
• Net elevation gain: 1029 m
• Total ascent: 1645 m
• Category: 1

Brotrinnl is a long Category 1 climb that punches above its gentle-looking average. The 616 m gap between net gain and total ascent, plus that 25.86% ramp, are the two numbers that matter — respect them, pace by effort, and gear low.