Sepii

Overview

Sepii is a Category 3 climb in Spain, running 7.5 km from its base at 1,202 m to a summit of 1,483 m. On paper it is a modest ascent: 281 m of net elevation gain over that distance, which works out to the 3.75% average gradient that lands it in Category 3. Both start and finish sit high, so you will be working in thinner air the whole way up.

The number that matters most here is the gap between net gain and total ascent. The road only lifts you 281 m end to end, but you actually climb 527 m to get there — meaning roughly 246 m of that ascent is repaid by descents and false flats along the way. That undulation makes Sepii harder than its average suggests. You pay for climbing you never bank, and the constant switching between up and down interrupts any rhythm you try to settle into.

How the Gradient Unfolds

The 3.75% average is close to meaningless on a climb like this. With 527 m of ascent squeezed into a road that only nets 281 m, the profile has to rise and fall repeatedly, and the steep pitches are concentrated in short ramps rather than spread evenly. The steepest section hits 14.05% — nearly four times the average — so the effort is spiky, not steady.

• Flatter and downhill recovery sections where the road gives elevation back
• Repeated short climbs that punch above the 3.75% average
• A steepest ramp touching 14.05%, short but sharp enough to force a gear change

Pacing Notes

Forget even-speed pacing here — chasing a constant km split will bury you on the ramps and leave you freewheeling on the descents. Pace by effort instead. Hold a controlled, repeatable output on the climbs, keep it near your sustainable power output, and let your speed swing with the terrain. On the flatter and downhill sections, back off and recover rather than hammering to protect an average.

Because the 14.05% ramp will spike your effort no matter how disciplined you are, budget for those surges and settle again quickly. If you are unsure what number to anchor to, use the FTP estimator to set a ceiling before you ride.

Gearing

The 14.05% maximum gradient governs your gearing choice, not the gentle average. Bring a compact or sub-compact chainset paired with a wide-range cassette — a 34×32 or 34×34 will let you spin over the steepest ramp without grinding to a standstill or overloading your knees at altitude. The repeated short climbs also mean frequent shifts, so a smooth-shifting wide-range setup earns its keep. Check your chainset and cassette before you head out; the ramps here are short enough that arriving under-geared turns a manageable Category 3 into a slog.

Summary

• Length: 7.5 km
• Average gradient: 3.75%
• Maximum gradient: 14.05%
• Net elevation gain: 281 m
• Total ascent: 527 m
• Category: 3

Sepii rewards riders who read the profile rather than the average. Pace by effort, gear for the 14.05% ramp, and treat the 527 m of total ascent — not the 281 m net — as the real measure of the day.