Magome Pass

Overview

Magome Pass is a Category 2 climb in Japan, running 9.5 km from a base at 306 m to a summit at 807 m. That gives a net elevation gain of 501 m across the ascent, at an average gradient of 5.27%. On paper it reads as a moderate, steady mid-length climb — the kind of effort you can settle into and hold for the better part of half an hour.

The paper figure is misleading. While the net gain is 501 m, the total ascent is 708 m — a difference of 207 m. That gap is undulation: sections where the road dips and rises again, forcing you to reclimb ground you already gave up. Every one of those extra metres costs energy that the net figure never accounts for, so the true effort sits well above what a flat 5.27% average would suggest.

How the Gradient Unfolds

The 5.27% average is a blend, not a constant. Undulating climbs like this one average out the flat and downhill stretches against the steep pitches, which means the hard ramps are considerably steeper than the headline number — this one peaks at 18.16%. Expect the effort to arrive in bursts rather than a smooth grind.

• Flatter and downhill sections where you recover — and lose momentum you must rebuild
• Repeated short climbs that stack up to the 708 m total ascent
• A steepest ramp near 18%, where cadence drops and the gearing decision is made or broken

Pacing Notes

On a smooth climb, even-effort and even-speed pacing converge. Here they diverge sharply. With 207 m of hidden reclimbing, chasing an even speed will spike you into the red on every ramp. Pace to a target sustainable power output instead, and let your speed fluctuate — ease over the crests, spin the descents, and save the matches for the steep pitches. Use the flatter recovery sections deliberately rather than hammering them. If you do not know your ceiling, run the FTP estimator before you commit to a number, then ride a touch under it early.

Gearing

Gear for the steepest ramp, not the average. An 18.16% pitch will overwhelm a standard road setup. Fit a compact (50/34) or sub-compact chainset paired with a wide-range cassette — a 34×32 or 34×34 gives you a bailout low enough to keep spinning when the road kicks up. Check your setup before the ride: confirm the chain reaches the largest sprocket cleanly and shifts under load. Discovering you are over-geared halfway up an 18% ramp is not a mistake you can fix on the road.

Summary

• Length: 9.5 km
• Average gradient: 5.27%
• Maximum gradient: 18.16%
• Net elevation gain: 501 m
• Total ascent: 708 m
• Category: 2

Magome Pass rewards riders who read past the average. Treat it as a 708 m climb disguised as a 501 m one, pace to effort, gear for the steep ramp, and it becomes a satisfying Category 2 test rather than a nasty surprise.