Cù Mông Pass

Overview

Cù Mông Pass is a compact, honest climb: 2.9 km of road that lifts you from 50 m at the base to a 235 m summit. That is 185 m of net elevation gain concentrated into a single, uninterrupted push, and at an average gradient of 6.46% it never lets you coast. This is a category 3 ascent — not the brutal, hors-catégorie suffering of a mountain pass, but steep enough and short enough that it rewards a committed, above-tempo effort rather than a patient grind. If you like climbs that are over before your legs fully protest, this is one of them.

How the Gradient Unfolds

The defining feature here is consistency. With an average of 6.46% and a maximum of 7.03%, the spread between the typical slope and the steepest ramp is just over half a percent. There is no wild pitch to survive, no false flat to recover on — the road simply tilts up and holds a steady angle from bottom to top. Practically, that means the gradient you feel in the opening hundred metres is very close to the gradient you will feel at the summit. The net gain of 185 m slightly exceeds the recorded total ascent of 167 m, confirming this is a clean, one-directional climb with essentially no dips or descending sections to break the rhythm. Set your effort early and expect the road to keep asking for the same output the whole way up.

Pacing Notes

Because the slope is so even, Cù Mông Pass is a climb you can pace almost by numbers. Over 2.9 km the effort is short enough to hold slightly above threshold — think of your FTP as the floor, not the ceiling, and lean over it for the duration. If you do not know your threshold, use the FTP estimator to set a realistic target before you attack. The trap on a steady climb like this is going out too hard in the first few hundred metres, where the fresh legs mask the cost; by the halfway mark that debt comes due. Aim for an effort you could just barely sustain to the 235 m summit, and save your final surge for the last stretch when the top is in sight.

Gearing

For a 6.46% average topping out at 7.03%, most riders will be comfortable on a compact setup. A 34×32 low gear gives you enough range to spin the steady slope without grinding, and for lighter legs or tired days a 34×34 offers a little extra insurance to keep your cadence up over the full 2.9 km. Because the gradient barely varies, you will likely settle into one or two cogs and stay there — pick the ratio that lets you hold a smooth, sustainable cadence rather than one that forces you to muscle each pedal stroke.

Summary

Cù Mông Pass is a clean, steady category 3 climb: short, consistent, and ideal for a focused threshold effort. No surprises in the gradient, no tricky sections — just 185 m of gain delivered at a reliable slope. Set your pace, choose a comfortable low gear, and commit.

Length: 2.9 km
Average gradient: 6.46%
Max gradient: 7.03%
Start: 50 m
Summit: 235 m
Net gain: 185 m
Total ascent: 167 m
Category: 3