Passo del Lupo

Overview

Passo del Lupo is a hors catégorie (HC) climb that leaves no room for doubt about its severity. Over 19.2 km it drags you from a valley floor at 233 m all the way to a 2242 m summit — a net elevation gain of 2009 m. The average gradient is a brutal 10.45%, a figure that would be steep for a short wall and is almost unheard of sustained across nearly twenty kilometres. This is not a climb you survive by luck; it demands respect, patience, and a plan.

How the Gradient Unfolds

The defining feature of Passo del Lupo is relentlessness. With a 10.45% average holding across the full 19.2 km, there is very little on this ascent that offers genuine recovery. The total ascent of 1972 m sits just below the 2009 m net gain, which tells you the road climbs almost continuously — there are no meaningful descents to interrupt the effort and reset your legs. In practice, that means you should expect to be working at or above threshold from the opening pedal strokes, with the summit at 2242 m arriving only after two thousand vertical metres of near-constant grinding. Thin air near the top will make the final kilometres feel even steeper than the numbers suggest.

Pacing Notes

On a climb this long and this steep, discipline early is everything. The single biggest mistake is starting above your sustainable ceiling — with 19.2 km ahead, going into the red in the first few kilometres guarantees a slow, painful unravelling later. Anchor your effort to your FTP and aim to sit just below it for the bulk of the ascent, saving any surges for the closing section once the summit is in reach. A 10.45% average gives you almost nowhere to soft-pedal, so a steady, repeatable power number matters more here than on gentler climbs. If you are unsure of your current threshold, run the numbers through the FTP estimator before you commit to a target, and build your pacing around what you can actually hold across a sustained effort.

Gearing

Do not under-gear this one. With a 10.45% average across 19.2 km and a 2009 m net gain, you want the easiest cassette you can reasonably run. A compact 34-tooth inner chainring paired with a 34×32 setup is the sensible minimum for strong climbers, giving you a low ratio to spin rather than grind. Most riders will be better served going further to a 34×34, which buys you crucial extra cadence to protect your legs deep into an ascent that simply does not relent. On a climb topping out at 2242 m, preserving a smooth, sustainable cadence is worth far more than the marginal weight of a bigger sprocket.

Summary

Passo del Lupo is an uncompromising HC test: long, thin-aired, and savagely steep from bottom to top. Pace it conservatively, gear it generously, and let the 2009 m of climbing come to you one steady kilometre at a time.

Length: 19.2 km
Average gradient: 10.45%
Max gradient: n/a
Start: 233 m
Summit: 2242 m
Net gain: 2009 m
Total ascent: 1972 m
Category: HC