Passo Tre Croci

Overview

Passo Tre Croci is a long, patient Italian climb: 20.5 km of road that lifts you from a start elevation of 951 m to a summit at 1805 m. That is 854 m of net vertical, earned over enough distance that the headline average gradient settles at a manageable-looking 4.17%. Don't let that number fool you into complacency, though. A climb this length rewards riders who respect the distance, and it hides a maximum pitch of 13.87% that can undo anyone who arrives at the base with an empty tank. It carries a category 2 rating, which on the standard scale (HC being the hardest, then 1, 2, 3, 4) places it firmly in serious-but-attainable territory.

How the Gradient Unfolds

The story here is contrast. An average of 4.17% across 20.5 km describes a road that is rarely flat but rarely brutal — yet the 13.87% maximum tells you the gradient is not evenly spread. Expect long stretches sitting a little under the average, punctuated by sharper ramps that spike well into double digits. With a net gain of 854 m over a total ascent of 836 m, the profile is almost entirely uphill with only the faintest relief; there is no meaningful downhill to recover on, so what you climb, you keep. The gap between the 4.17% average and that 13.87% peak is the whole tactical puzzle: ride the shallow sections too hard and the steep pitches will find you out.

Pacing Notes

For a climb of 20.5 km, effort management beats bravado every time. Anchor your pace to your FTP and aim to spend the bulk of the climb slightly below threshold, holding a sustainable rhythm through the shallower gradients so you have headroom when the road tilts toward its 13.87% maximum. Treat those steep ramps as brief over-threshold surges, not new baselines — settle back to your steady effort as soon as the pitch eases. If you're unsure what your threshold actually is, run the numbers through the FTP estimator before you commit to a target. The 854 m of climbing is a long time under load, so a pace that feels easy in the first few kilometres is exactly the right kind of discipline.

Gearing

The combination of length and that 13.87% spike argues for gearing on the generous side. A compact 34-tooth inner chainring paired with a 34×32 low is a sensible starting point for strong climbers, giving you a workable cadence through the steeper ramps without over-grinding. If you climb at a higher cadence, carry extra bodyweight, or simply want insurance for a bad day late in the 20.5 km, step up to a 34×34. The extra sprocket costs you almost nothing on the shallow 4.17%-average stretches and buys real comfort when the gradient bites toward its maximum.

Summary

Passo Tre Croci is a distance-driven category 2 climb that asks for patience over power: settle in, meter your effort, and let the 854 m come to you.

Length: 20.5 km
Average gradient: 4.17%
Max gradient: 13.87%
Start: 951 m
Summit: 1805 m
Net gain: 854 m
Total ascent: 836 m
Category: 2