Arthur's Pass

Overview

Arthur's Pass is a Category 2 climb in New Zealand, running 6.3 km from a start elevation of 447 m to a summit at 925 m. Over that distance you gain 478 m of net elevation at an average gradient of 7.6%. On paper that reads as a steady, sustained effort — a climb long enough to matter but short enough to attack if your pacing is disciplined.

The paper number hides the real shape of the road. While the net gain is 478 m, the total ascent is 687 m. That 209 m difference is undulation: the road repeatedly kicks up, levels, and even drops before climbing again. You are doing more vertical work than the net figure suggests, and every descent between ramps forces you to spend energy re-accelerating. Budget your effort against the 687 m of climbing you will actually do, not the 478 m the summit sign implies.

How the Gradient Unfolds

A 7.6% average is not what you meet on the road. The undulation means the gradient swings well above and below that figure — flatter breathers offset by pitches steeper than the average. Read the profile as a series of efforts rather than one continuous wall.

• Flatter and recovery sections where the road eases or dips, giving you a window to reset your breathing
• Repeated short climbs stacked back to back, each demanding a fresh surge to hold momentum
• A distinctly steeper ramp where the gradient peaks well above 7.6% — the crux of the climb

Pacing Notes

On an undulating climb like this, chase even effort, not even speed. If you fixate on holding one steady pace, you will over-spend on the steep ramps and coast the flatter parts, arriving at the summit cooked. Instead, hold a consistent sustainable power output and let your speed rise and fall with the road — fast through the shallow dips, slower up the steep pitches, but the same effort throughout.

Practically: ease slightly below threshold on the flatter recovery sections so you have headroom for the ramps, and never let a short kick tempt you into a redline you cannot repeat. Know your ceiling before you start. Run the FTP estimator to set the number you will pace against, then ride to it.

Gearing

The steepest ramp is the gradient that dictates your setup, not the average. On pitches well above 7.6%, an undergeared bike turns a hard climb into a walk. Fit a compact or sub-compact chainset paired with a wide-range cassette — a 34×32 or 34×34 gives you the low end to spin the crux without grinding your cadence into the ground. Check your chainrings and cassette before the ride; the summit is no place to discover you are one gear short.

Summary

• Length: 6.3 km
• Average gradient: 7.6%
• Net elevation gain: 478 m
• Total ascent: 687 m
• Category: 2

Arthur's Pass is a Category 2 climb that rewards riders who pace to its total ascent rather than its net gain. Respect the undulation, gear for the steepest ramp, and hold an even effort — do that, and 6.3 km of NZ climbing plays to your strengths instead of your ego.