Port de Sant Miquel

Overview

Port de Sant Miquel is the kind of climb that hides its severity in its length. At just 1.5 km it barely registers as a climb on paper, yet it packs an average gradient of 8.97% into that distance — a figure that puts it firmly in the territory of a serious effort rather than a warm-up drag. It launches from a start elevation of only 6 m, effectively at sea level, and hauls you up to a summit of 139 m. That gives a net elevation gain of 133 m over the road, with 118 m of total ascent once you account for the profile's brief flatter respites. This is a category 3 climb, but the number understates how it feels on the legs: short, steep, and unrelenting from the moment the gradient bites.

How the Gradient Unfolds

The shape here is defined by consistency and a sharp sting. With an 8.97% average holding across the full 1.5 km, there is nowhere to truly recover — the road pitches up early and stays up. The defining feature is the max gradient of 12.73%, a ramp steep enough to force a decisive change of rhythm. Expect the steepest sections to arrive as clear kicks rather than a single long wall, punctuating an already demanding baseline. Because the climb rises 133 m net across such a compressed distance, every metre of road is doing work; there are no long false flats to sit and spin. The difference between the 12.73% spikes and the 8.97% average — roughly 3.76% — tells you how much harder the worst ramps feel than the "easy" parts.

Pacing Notes

On a climb this short, pacing is almost entirely about not blowing up on the first steep ramp. You can afford to ride Port de Sant Miquel above your sustainable threshold because the whole effort is over in around a kilometre and a half — closer to a hard interval than a steady tempo grind. Aim to hold an effort noticeably above your FTP, settling into the 8.97% sections and saving a little for the 12.73% pitches so you don't stall. If you don't know your threshold number, run it through the FTP estimator first so you can calibrate how deep to go. The goal is a controlled surge, not an early explosion followed by a survival crawl over the final metres to 139 m.

Gearing

Short and steep is exactly the profile that punishes undergearing. With a sustained 8.97% and ramps to 12.73%, you want gears that let you keep cadence high rather than grinding out of the saddle. A compact 34-tooth chainring paired with a 34×32 low is a sensible baseline for stronger riders, but most people will be happier with a 34×34 to spin through the steepest kicks without wrecking their legs. If your cassette offers it, having that 34×34 in reserve turns the 12.73% ramps from a lurch into a manageable rhythm.

Summary

Port de Sant Miquel is a compact, punchy category 3 test: 1.5 km of near-sea-level road that climbs hard and fast to its summit. Treat it as a high-intensity effort, gear low enough to keep spinning, and it rewards riders who commit early without overcooking the opening ramp.

Length: 1.5 km
Average gradient: 8.97%
Max gradient: 12.73%
Start: 6 m
Summit: 139 m
Net gain: 133 m
Total ascent: 118 m
Category: 3