Colle di Val d'Elsa Cathedral

Overview

The Colle di Val d'Elsa Cathedral climb is a compact, honest ascent that rewards rhythm over heroics. Over 3.6 km it lifts you from a start elevation of 84 m to a summit of 264 m, a net gain of 180 m at an average gradient of 5.04%. The category 4 rating is well earned: this is the gentlest tier on the classification scale, but the consistency of the grade means it still asks a real, sustained effort rather than a brief burst. The recorded total ascent of 162 m confirms this is a near-continuous drag upward, with very little false-flat or descent to break the pattern.

How the Gradient Unfolds

What defines this climb is its uniformity. With an average of 5.04% and a maximum of just 5.66%, the difference between the typical grade and the steepest ramp is only about 0.62 percentage points. There are no walls, no double-digit surprises, and no sudden pitches that force you out of the saddle. Instead you get a steady incline that hovers close to its own average for almost the entire 3.6 km. That makes the climb exceptionally readable: once you settle into the first few hundred metres, you can trust that the road ahead will feel much the same. The 5.66% max simply marks the firmest section, a modest lean rather than a genuine kicker.

Pacing Notes

Because the gradient is so even, this is a climb where power discipline pays off. Aim to hold a smooth output just below your threshold and let the consistency of the road do the work. A useful anchor is your FTP — riding at roughly 85 to 90% of it will carry you up all 180 m of gain without blowing your legs before the top. If you do not know your number yet, run the FTP estimator first and set your target watts from there. With only 5.66% at the steepest, there is no need to bank effort for a hard finish; spend evenly across the full 3.6 km and you will crest the 264 m summit with something left. Resist the urge to surge early — the flat gradient profile means early spikes cost more than they return.

Gearing

For a climb averaging 5.04% and peaking at 5.66%, most riders will be comfortable with a compact setup. A 34×32 lowest gear gives plenty of room to spin the steady grade at a relaxed cadence, and it is the natural choice for fit riders who like to stay seated and turn the pedals over. If you prefer extra insurance, or you are carrying fatigue from a longer day, a 34×34 drops the effort further and lets you keep cadence high even on the 5.66% section. Either way, this is not a climb that demands the deepest cassette — the modest maximum gradient means 34×32 is ample for the majority, with 34×34 as a welcome comfort margin.

Summary

The Colle di Val d'Elsa Cathedral is a textbook steady climb: short, uniform, and ideal for practising even pacing. Settle in, hold your rhythm, and enjoy a grade that never tries to catch you out.

Length: 3.6 km
Average gradient: 5.04%
Max gradient: 5.66%
Start: 84 m
Summit: 264 m
Net gain: 180 m
Total ascent: 162 m
Category: 4