Nigerpass

Overview

Nigerpass is a hors catégorie (HC) climb, the hardest classification there is — above categories 1, 2, 3, and 4. Over its 16.2 km it averages a brutal 8.49% and pitches as steep as 18.05%. Starting at 315 m and topping out at 1694 m, it delivers a net elevation gain of 1379 m across a total ascent of 1361 m — meaning the road climbs almost relentlessly with barely any respite to give back. This is a sustained, high-altitude effort that rewards patience and punishes anyone who starts too hard.

How the Gradient Unfolds

The defining feature of Nigerpass is consistency. With an 8.49% average sustained across 16.2 km, there are no easy kilometres here — the climb simply keeps tilting upward. The difference between the 1379 m net gain and the 1361 m total ascent is only 18 m, which tells you almost the entire route trends up with no meaningful descending sections to recover on. The 18.05% maximum gradient marks the sharpest ramp, more than double the average, so expect at least one section where the road kicks hard enough to force you out of the saddle. Between those pitches, the grade rarely drops far enough to feel like a break. Treat the whole 16.2 km as one continuous effort rather than a series of stages.

Pacing Notes

On a climb this long and steep, pacing discipline decides your day. Your target power should sit at or just below your FTP — sustaining an 8.49% average for 16.2 km means you'll be riding near threshold for a long time, and going over early will cost you dearly on the upper slopes. If you don't know your threshold, run the numbers through the FTP estimator first so you can set a realistic ceiling. Meter your effort from the base at 315 m: hold something you can defend all the way to the 1694 m summit, and save a little for the 18.05% ramp so it doesn't blow your rhythm apart. Steady beats heroic every time on an HC ascent like this.

Gearing

Gear for survival, not ego. With a 8.49% average and pitches touching 18.05%, you want a compact setup with a wide-range cassette. A 34×32 is the sensible minimum here, giving you a low enough ratio to spin the sustained middle sections without grinding. But given the length and the steepest 18.05% ramps, most riders will be far happier with a 34×34 — that extra sprocket preserves cadence when the road tips up and your legs are already 1000-plus metres deep into the gain. If your bike accepts even lower gearing, don't be shy about using it; over 16.2 km, keeping your cadence up saves your legs.

Summary

Nigerpass is a true HC test: long, steep, and unrelenting from base to summit. Respect the 8.49% average, pace under your threshold, gear low, and the 1379 m of climbing becomes an achievement rather than an ordeal.

Length: 16.2 km
Average gradient: 8.49%
Max gradient: 18.05%
Start: 315 m
Summit: 1694 m
Net gain: 1379 m
Total ascent: 1361 m
Category: HC