Coll de Port

Overview

Coll de Port is a Category 1 climb in Spain, running 9.7 km from a start elevation of 938 m to a summit of 1,699 m. That gives a net elevation gain of 761 m at an average gradient of 7.86% — a proper sustained mountain effort that sits firmly in the harder end of the categorised range.

The number that reframes the climb is total ascent: 1,157 m against a net gain of 761 m. That 396 m gap means the road does not rise cleanly. You climb, give some height back, and climb again, and every metre surrendered on a descent has to be re-earned. The 7.86% average is diluted by those downhill and flatter sections, so the pitches that actually count are steeper than the headline number implies. Plan for a climb that feels harsher than its average suggests.

How the Gradient Unfolds

The 7.86% average hides both the recovery and the pain. Undulation of this size tells you the gradient swings well above and below the mean, and the steepest recorded ramp hits 21.27% — steep enough to force you out of the saddle or drop you to your lowest gear.

Across the profile, expect:

• Flatter or gently descending sections that briefly drop below the average and let you recover
• Repeated short climbs where lost height is regained, each one taxing tired legs
• At least one savage ramp near 21.27%, where cadence collapses and torque matters most

Pacing Notes

On a smooth climb you can hold even effort and even speed together. Here you cannot. The undulation means chasing a fixed speed will spike your power on every ramp and waste it on every dip. Instead, pace to even effort: hold a steady sustainable power output and accept that your speed will rise and fall with the road.

Let the flatter sections be genuine recovery rather than a place to hammer, and save your matches for the 21.27% ramp, where the cost of going too hard is highest. If you do not know your ceiling, run the FTP estimator first and anchor your target power to it.

Gearing

The 21.27% ramp governs your setup. At that gradient a standard chainset will grind you to a halt, so run a compact (50/34) or sub-compact and pair it with a wide-range cassette — a 34×32 or 34×34 low gear gives you the range to keep spinning when the road stands up. Aim to protect your cadence rather than muscle over the steep pitches.

Check your chainset and cassette before the ride. Confirming your lowest gear at home is far cheaper than discovering it mid-ramp.

Summary

• Length: 9.7 km
• Average gradient: 7.86%
• Maximum gradient: 21.27%
• Net elevation gain: 761 m
• Total ascent: 1,157 m
• Category: 1

Coll de Port rewards riders who respect its undulation. Pace to power, gear for the steepest ramp, and treat the 396 m of extra ascent as the real difficulty — not the average.