Shomaru Pass

Overview

Shomaru Pass is a Category 3 climb in Japan, running 11.2 km from base to summit. It starts at 248 m and tops out at 665 m, for a net elevation gain of 417 m. On paper it reads as a moderate, mid-length effort, and the category places it firmly in the accessible-but-real range for most riders.

Look closer and the numbers tell a second story. The net gain is 417 m, but the total ascent is 700 m. That 283 m gap is climbing you do that the summit elevation never credits you for, because the road repeatedly loses altitude before clawing it back. In practice this means the pass is undulating rather than a clean, steady grind, and the true effort is meaningfully higher than the net figure suggests.

How the Gradient Unfolds

The 3.71% average is the least useful number on this climb. Averaging 700 m of ascent across 11.2 km flattens out both the descents that pad the distance and the sharp ramps that define the day. The steepest recorded pitch hits 13.28%, roughly three and a half times the average, so the hard sections are genuinely hard even if they are short.

Expect this shape across the profile:

• Flatter and even downhill recovery sections where the road gives back altitude
• Repeated short climbs that stack up into the 700 m total ascent
• A steepest ramp around 13.28% that will spike your effort well above cruising pace

Pacing Notes

On a smooth, steady climb you can hold even power and let speed take care of itself. Shomaru Pass punishes that approach. Because the gradient swings from downhill to 13.28%, holding one wattage means crawling on the ramps and freewheeling on the dips.

Pace to the terrain instead. Sit just below your sustainable power output on the flatter and rolling sections, then allow controlled surges over the short steep pitches, knowing recovery is never far away. If you do not know that ceiling yet, run the FTP estimator before you go so your surges stay repeatable rather than one-and-done.

Gearing

Your gearing should be governed by the 13.28% maximum, not the gentle average. A compact (50/34) or sub-compact chainset paired with a wide-range cassette gives you the low gear to spin the steep ramps rather than grind them. A 34×32 or 34×34 combination keeps your cadence up when the road kicks, which protects your legs across the repeated climbs. Check your setup before the ride so you are not discovering a too-tall bottom gear halfway up a 13% wall.

Summary

• Length: 11.2 km
• Average gradient: 3.71%
• Maximum gradient: 13.28%
• Net elevation gain: 417 m
• Total ascent: 700 m
• Category: 3

Shomaru Pass rewards riders who read past the average. Gear for the 13.28% ramps, pace to the undulating terrain rather than a fixed number, and treat the 700 m of total ascent as the honest measure of the day.