Trollstigen

Overview

Trollstigen is a Category 1 climb that packs relentless difficulty into just 6.1 km. From a start elevation of 45 m it drives up to a summit of 704 m, a net gain of 659 m over that short span. The headline number is the average gradient: 10.77% sustained across the whole ascent. There is no long false flat to hide in and no gentle run-in to warm the legs. This is a wall that stays a wall from bottom to top, and the total ascent of 654 m confirms there is almost no relief along the way.

How the Gradient Unfolds

With a 10.77% average and a max of 22.81%, the defining feature of Trollstigen is how little the road relents. A climb this steep for this long means the "easy" sections are still hard, and the steep sections bite deep. The 22.81% maximum is more than double the average, so expect sharp pitches that spike well above what your legs have settled into. Because the total ascent (654 m) sits so close to the net gain (659 m), the profile is almost purely upward — there are effectively no descents or flat recovery zones to reset your rhythm. Every one of the 6.1 km asks for the same steady, grinding effort, with the steepest ramps demanding a brief surge before you settle back onto the 10.77% grind.

Pacing Notes

On a climb averaging 10.77%, pacing by feel is dangerous — the gradient will happily let you overcook the opening kilometre. Anchor your effort to your FTP instead. At 6.1 km and this gradient, most riders are looking at a sustained near-threshold effort, so aim to hold a wattage you can defend for the full climb rather than one you can only survive for a minute. If you do not know your threshold number, run it through the FTP estimator before you commit to a target. Save a small reserve for the 22.81% pitches: on ramps that steep, momentum vanishes instantly, and clawing back speed costs far more than holding it would have. Ride the steep sections a touch under your ceiling and let the marginally shallower stretches be where you steady the breathing.

Gearing

Do not under-gear this one. With a 10.77% average and pitches to 22.81%, you want a wide range and a bailout cog you can spin. A 34×32 is the sensible minimum here — enough for the average grade but marginal on the steepest ramps if you are carrying any fatigue. For most riders a 34×34 is the smarter call, giving you a cadence you can actually turn over when the road tips toward 22.81%. If you have access to an even easier ratio, on a climb this steep you will use it. The goal is to keep the pedals moving smoothly rather than grinding to a crawl, because on 20%-plus gradients a stalled cadence is very hard to recover.

Summary

Trollstigen is short but savage: 6.1 km that never eases, averaging 10.77% and spiking to 22.81%, lifting you 659 m from valley to summit. Gear low, pace to threshold, and respect the steep ramps.

Length: 6.1 km
Average gradient: 10.77%
Max gradient: 22.81%
Start: 45 m
Summit: 704 m
Net gain: 659 m
Total ascent: 654 m
Category: 1