Bocca di Selva

Overview

Bocca di Selva is a long, honest category 1 climb that rewards patience over punch. Over 25.6 km it lifts you from a valley floor at 144 m to a summit at 1551 m, a net gain of 1407 m. The average gradient reads a moderate 5.5%, but that single number hides the reality of the ascent: nearly half an hour of continuous climbing where the effort compounds kilometre after kilometre. This is a climb won by managing fatigue, not by attacking early.

How the Gradient Unfolds

The headline figure is 5.5%, but averages flatten the story. With a total ascent of 1395 m spread across 25.6 km, the road rarely sits still at its mean. Expect stretches that ease well below 5.5% where you can recover, offset by steeper ramps that bite hard, the sharpest touching 13.48%. That maximum is more than double the average, so the difficulty is front-loaded into the steep pitches rather than smeared evenly across the distance. The small gap between the net gain of 1407 m and the total ascent of 1395 m tells you the road climbs almost monotonically, with little false descent to break the rhythm. Treat every gradient spike as a moment to soften your effort, not to force it.

Pacing Notes

On a climb this length, pacing discipline is everything. The steady 5.5% average makes Bocca di Selva an ideal candidate for riding to power. Aim to hold a percentage of your FTP that you can sustain for the full 25.6 km rather than the pace you could manage for five minutes. A common approach is to target just under threshold on the shallower sections and allow surges toward threshold only on the steepest ramps near 13.48%, then settle back down. If you do not know your threshold, work it out first with the FTP estimator so your target numbers reflect your real ceiling. Going out too hard in the opening kilometres is the classic error here; with more than 1400 m of climbing ahead, an early overreach is paid back with interest long before the 1551 m summit.

Gearing

Given the 25.6 km length and pitches reaching 13.48%, gearing generously is the smart choice. A compact 34-tooth inner chainring paired with a wide-range cassette gives you the spin you need to protect your legs over 1407 m of climbing. A 34×32 bottom gear is a sensible starting point for strong climbers, keeping cadence high through the steeper ramps. If you weigh more, ride at a lower threshold, or simply want insurance for the 13.48% sections late in the climb when fatigue has set in, step up to 34×34. The extra range costs you nothing on the shallow stretches and saves your knees when the road tilts up.

Summary

Bocca di Selva is a climb of endurance and composure: 25.6 km of near-continuous ascent, a steady 5.5% average punctuated by a 13.48% maximum, and a 1407 m rise to a high summit. Pace it to your threshold, gear it low, and let the length work for you rather than against you.

Length: 25.6 km
Average gradient: 5.5%
Max gradient: 13.48%
Start: 144 m
Summit: 1551 m
Net gain: 1407 m
Total ascent: 1395 m
Category: 1