Coll de Santa Helena

Overview

The Coll de Santa Helena is a long, sustained category 1 climb that asks for patience more than fireworks. Over 20 km it lifts you from a valley floor at 151 m all the way to a 1225 m summit, banking 1074 m of net elevation gain along the way. The average gradient of 5.37% sounds friendly on paper, and for long stretches it is — but the 11.03% maximum tells you this road has teeth. At 20 km, this is a climb you settle into, not one you attack. Riders who respect the length here tend to arrive at the top with something left; those who don't usually meet the steepest ramps already in the red.

How the Gradient Unfolds

Think of Santa Helena as a climb of shifting moods rather than a single unbroken wall. The 5.37% average is a blend: gentler drags that let you spin, punctuated by sharper kicks that spike toward the 11.03% maximum. That gap between average and max — nearly six percentage points — is the story of the climb. It means the road rarely sits still at its stated gradient. Expect passages where you can find rhythm and breathe, then abrupt pinches that force you out of the saddle or down a cog. With total ascent measured at 1062 m against a net gain of 1074 m, the profile climbs almost relentlessly upward with very little relief, so there are few true recovery zones to bail you out.

Pacing Notes

On a climb this long, discipline beats bravado. Aim to ride the first two-thirds at or just below your sustainable threshold, saving matches for the steep ramps rather than burning them on the flatter sections where wind and momentum help. A useful anchor is your FTP: on a 20 km effort you'll be riding close to it for a long time, so knowing that number turns guesswork into a plan. If you're unsure where yours sits, run the numbers through the FTP estimator before you commit to a target. When the gradient jumps toward 11.03%, resist the urge to hold your wattage flat — let cadence carry you and accept a brief surge, then settle again once the road eases.

Gearing

Given 20 km at 5.37% average with pitches up to 11.03%, err toward easier gearing than you think you need — fatigue late in a long climb makes every ramp feel steeper. A compact 34-tooth chainring paired with a 34×32 low gear is a sensible baseline for strong climbers who can turn a bigger gear on the steep bits. If you weigh more, ride at a higher cadence, or simply want insurance for the final third, step up to a 34×34. That extra sprocket buys you the spin to stay seated and controlled through the 11.03% pinches instead of grinding to a standstill.

Summary

The Coll de Santa Helena rewards even pacing and honest gearing. It's a genuine category 1 test — long enough to expose poor pacing, steep enough in places to punish over-geared legs. Ride it smooth, spin the ramps, and the 1225 m summit comes to you.

Length: 20 km
Average gradient: 5.37%
Max gradient: 11.03%
Start: 151 m
Summit: 1225 m
Net gain: 1074 m
Total ascent: 1062 m
Category: 1