Colle Bettaforca

Overview

Colle Bettaforca is an HC climb — hors catégorie, the hardest rating there is — and its numbers explain why. Over 35.4 km the road climbs at a 6.5% average, dragging you from a start elevation of 370 m all the way to a 2671 m summit. That is 2301 m of net elevation gain, with a total ascent of 2267 m once the small dips along the way are accounted for. Very few climbs combine this much distance with this much altitude, and at 24.04% the steepest pitch is severe enough to break a rhythm you have spent an hour building.

How the Gradient Unfolds

The headline 6.5% is an average, and on a climb of 35.4 km an average is a story rather than a description. Some kilometres will sit comfortably below that figure and feel almost like recovery; others will spike well above it. The 24.04% maximum tells you the road is not uniform — expect the gradient to swing, with the sharpest ramps demanding a completely different effort from the shallower drags. Because the net gain (2301 m) slightly exceeds the total ascent (2267 m), the climb is very nearly monotonic: you are almost always going up, with only minor flatter sections to break the grind. Read the whole 35.4 km as a series of moods rather than one steady wall.

Pacing Notes

The single biggest mistake on a climb this long is starting too hard. With 35.4 km ahead of you, discipline in the first third pays off enormously in the last. Anchor your effort to your FTP and hold the early kilometres below it, saving headroom for the steep ramps toward 24.04% that will spike your power whether you like it or not. If you do not know your current threshold, run the numbers through the FTP estimator before you go — pacing a 2301 m ascent blind is how riders blow up. Treat the summit at 2671 m with respect too: thinner air near the top quietly raises the cost of every watt.

Gearing

Gear for the ramps, not the average. A 6.5% mean is manageable, but the 24.04% maximum is where under-geared riders grind to a walking pace and wreck their legs. On a 35.4 km effort with 2301 m of climbing, a compact chainring paired with a wide-range cassette is the sensible baseline. A 34×32 is the minimum I would run here; if you weigh more, are carrying luggage, or simply want to spin the steep pitches rather than muscle them, step up to a 34×34 or larger. The extra sprocket costs nothing on the shallow sections and saves your climb on the vicious ones.

Summary

Colle Bettaforca is a true HC test: long, high, and spiked with a brutal maximum gradient. Pace it patiently, gear it generously, and respect the altitude, and its 2671 m summit is one of the great rewards in cycling.

Length: 35.4 km
Average gradient: 6.5%
Max gradient: 24.04%
Start: 370 m
Summit: 2671 m
Net gain: 2301 m
Total ascent: 2267 m
Category: HC