Col de Bavella

Overview

Col de Bavella is a long, patient Category 1 climb that rewards riders who respect its length rather than its steepness. Over 18.8 km it lifts you from a start elevation of 270 m to a summit of 1222 m, a net gain of 952 m. The headline average gradient of 5.05% sounds forgiving, and in isolation many of its ramps are. What makes Bavella a genuine Category 1 effort is how long you spend on the throttle: nearly nineteen kilometres of continuous work with almost no true recovery.

That length is the story here. A 5% average sustained for this distance sits comfortably below the wall-like pitches of an hors catégorie monster, yet it demands a completely different kind of discipline. This is a climb of rhythm and metering, not of raw power.

How the Gradient Unfolds

With an average of 5.05% across 18.8 km and no single defining maximum on record, expect a rolling, undulating profile rather than a uniform wall. The total ascent of 1926 m against a net gain of 952 m tells you the road does not climb in a straight line — it gives back roughly 974 m of elevation along the way through descents and false flats before clawing it back. In practice that means stretches noticeably steeper than 5% traded against dips and plateaus that let your legs breathe.

Treat the 5.05% figure as an accounting average, not a gradient you will actually sit at for long. Read the road ahead, stay light over the flatter sections, and save something for the pitches that inevitably bite harder than the number suggests.

Pacing Notes

The single biggest mistake on a climb like this is starting too hard on the early, gentler slopes. With 18.8 km ahead, your goal is a sustainable, repeatable effort anchored to your FTP. For a climb of this length, most riders will want to sit just below threshold on the steady sections and only nudge above it on the sharper ramps.

If you are unsure of your threshold, run the numbers through the FTP estimator before you go, then set a power or heart-rate ceiling and hold to it. On the false flats and descents that make up part of the total ascent, keep pedalling — those are free metres of recovery that let you attack the steeper kicks without redlining.

Gearing

Nineteen kilometres at a fluctuating gradient favours a spinning cadence over a grinding one, so gear for the long haul rather than the average. A compact chainring paired with a wide-range cassette is the right call. A 34×32 will handle the bulk of the climb comfortably for reasonably fit riders, letting you keep the pedals turning through the steeper interruptions.

If you tire late, run heavier gear, or simply prefer to protect your knees over a long day, step up to a 34×34. The extra sprocket costs you nothing on the flatter sections and buys real insurance on the pitches that exceed the 5.05% average.

Summary

Col de Bavella is a rhythm climb: long, rolling, and best ridden with a metered effort and a generous cassette. Respect the distance, spin the sharp ramps, and use the flatter kilometres to recover.

Length: 18.8 km
Average gradient: 5.05%
Max gradient: n/a
Start: 270 m
Summit: 1222 m
Net gain: 952 m
Total ascent: 1926 m
Category: 1