Passo del Lago Cavegna

Overview

The Passo del Lago Cavegna is a genuine hors catégorie ascent, and its raw numbers explain the rating instantly. From a valley start at 225 m, the road climbs relentlessly to a summit of 2115 m — a net gain of 1890 m spread across 28.2 km at an average gradient of 6.71%. With a total ascent of 1881 m, there is almost no respite baked into the profile: what goes up largely stays up. This is a climb measured in hours, not minutes, and it rewards riders who treat it as a sustained effort rather than a series of short punches.

How the Gradient Unfolds

At 6.71% averaged over 28.2 km, the Cavegna is remarkably consistent. The near-identical figures for net gain (1890 m) and total ascent (1881 m) tell you the road trends upward almost everywhere, with only trivial dips — the 9 m difference between the two is all the descending you get across the whole climb. That consistency is a double-edged sword: there are no false flats to spin out on and recover, but there are also no cruel walls that force you out of the saddle. Expect the gradient to hover around that 6.71% mean for long stretches, occasionally leaning steeper as the road gains the upper slopes toward 2115 m. Plan your effort around the average, and let the terrain surprise you upward rather than down.

Pacing Notes

Over a climb this long, pacing discipline decides everything. Twenty-eight kilometres of continuous uphill will punish anyone who starts hot. The single most useful reference point is your FTP: for a sustained HC effort of this duration, most riders should settle in comfortably below threshold — think a percentage you can hold for well over an hour — and only lift the pace in the final kilometres once the summit is in reach. If you do not know your current threshold, run your recent data through the FTP estimator before you commit to a target. Fuel early and often; the climb is long enough that glycogen management matters as much as watts. Break the 28.2 km into mental segments and tick them off rather than staring at the full distance to the top.

Gearing

Do not under-gear this one. A 6.71% average sustained for 28.2 km means you will be turning the same low ratios for a very long time, and fatigue makes every gradient feel steeper in the back half. A compact 34-tooth chainring paired with at least a 32-tooth cassette sprocket (34×32) is the sensible minimum for strong climbers. Most riders — and anyone carrying fatigue or extra weight — will be far happier with a 34×34, giving you a spinning gear to protect your knees and preserve your legs for the summit at 2115 m. When in doubt, choose the easier setup; you can always stay seated and spin, but you cannot un-cramp a leg you have ground into the ground.

Summary

The Passo del Lago Cavegna is a patience climb: long, steady, and unforgiving in its length rather than its pitch. Respect the distance, gear low, pace off your threshold, and the 1890 m of vertical will come to you.

Length: 28.2 km
Average gradient: 6.71%
Max gradient: n/a
Start: 225 m
Summit: 2115 m
Net gain: 1890 m
Total ascent: 1881 m
Category: HC