Kurikara Pass

Overview

Kurikara Pass is a Category 4 climb in Japan, running 8.3 km from a low start at 12 m of elevation to a summit at 267 m. On paper it is a modest ascent: the net elevation gain is 255 m, and the average gradient of 3.07% reads as an easy spin. For a rider scanning the headline numbers, this looks like a warm-up rather than a target.

The numbers hide a catch. While the net gain is 255 m, the total ascent is 413 m — a difference of 158 m. That gap is undulation: the road climbs, gives some of it back, then climbs again. You do not just gain 255 m of height, you pedal up 413 m of it, and every metre handed back on a descent is a metre you have to reclaim. The average gradient is diluted by those downhill and flat sections, so the effort on the climbing pitches is noticeably harder than 3.07% suggests.

How the Gradient Unfolds

An average of 3.07% across 8.3 km tells you almost nothing about how the road actually feels. With 413 m of total ascent packed into a route that only nets 255 m, the gradient is not steady — it swings. The steepest ramp hits 12.84%, more than four times the average, so there is at least one pitch that will have you out of the saddle.

• Flatter and recovery sections where the road eases or tips slightly downhill — use them, don't coast mentally
• Repeated short climbs that stack up to produce the extra 158 m of ascent beyond the net gain
• A steepest ramp at 12.84% that demands a real gear change and a hard effort

Pacing Notes

On a smooth, even climb you can hold a steady speed. On Kurikara Pass, don't. Chasing an even speed forces you to overpower the 12.84% ramp and soft-pedal the flatter parts, spiking your effort exactly where it costs most. Instead, pace to an even effort: hold a steady sustainable power output and let your speed rise on the shallow sections and drop on the steep ones. Over undulating terrain that approach conserves the most energy. If you don't know your number, run the FTP estimator first so your target on the day is grounded, not guessed.

Gearing

The average gradient is irrelevant to gear choice here — the 12.84% ramp governs it. To turn that pitch over at a cadence you can sustain, ride a compact or sub-compact chainset paired with a wide-range cassette, something like 34×32 or 34×34. That gives you the bailout ratio to keep spinning where a stock setup would grind you to a mash. Check your chainset and cassette before the ride, not at the base of the steep section.

Summary

• Length: 8.3 km
• Average gradient: 3.07%
• Maximum gradient: 12.84%
• Net elevation gain: 255 m
• Total ascent: 413 m
• Category: 4

Kurikara Pass rewards riders who read past the average. Pace to effort, gear for the 12.84% ramp, and treat the 158 m of hidden ascent as the real workload — do that and this Category 4 climb goes smoothly.