Surduc Pass

Overview

Surduc Pass is a long, patient category 1 ascent that trades brute steepness for sheer duration. Over 26 km it lifts you from a valley floor at 320 m to a summit of 1641 m, a net gain of 1321 m at an average gradient of 5.08%. On paper that average reads as gentle, and much of the climb genuinely is — but the total ascent of 1322 m confirms there is barely any respite along the way. The extra metre over the net figure tells you this is an almost relentlessly upward road with only the faintest dips to recover on. Add a maximum gradient of 17.25% and you have a climb that lulls you into rhythm before demanding a sudden, sharp effort.

How the Gradient Unfolds

The defining characteristic here is length. At 26 km, Surduc Pass is the kind of climb where you settle into a cadence early and hold it for the better part of an hour or more. A 5.08% average across that distance means the road is almost never flat and almost never punishing — it simply keeps tilting upward. The gap between the 1321 m net gain and the 1322 m total ascent shows there is essentially no descending to break the flow, so momentum is hard-won and easily lost.

The number to respect is the 17.25% maximum. Against a 5.08% average, that peak is more than three times steeper than the mean, so it will arrive as a genuine spike rather than a gentle stiffening. Expect the majority of the climb to sit comfortably below the average, with the difficulty concentrated in a handful of steeper ramps that push well into double digits.

Pacing Notes

On a climb this long, pacing is everything. The temptation on the shallow early kilometres is to ride harder than the gradient warrants, but with 26 km ahead you will pay for that later. Anchor your effort to your FTP and aim to spend the steady sections just below threshold, leaving headroom for the 17.25% pitch. If you do not know your threshold, the FTP estimator will give you a working number to pace against.

Because the average is a modest 5.08%, you can afford a sustainable tempo for most of the ascent. Treat the steepest ramp as a short, contained surge — get out of the saddle if needed, then settle straight back into rhythm once the road relaxes. Fuelling matters over 1321 m of climbing, so eat and drink early rather than waiting until you feel the deficit.

Gearing

A 5.08% average is manageable on almost any gearing, but the 17.25% maximum is what dictates your setup. For most riders a compact chainset paired with a wide cassette is the sweet spot. A 34×32 will cover the bulk of the 26 km comfortably, but on the steepest pitch a 34×34 gives you the extra spin to keep cadence up without grinding. If your legs are still fresh late in a 1321 m ascent that is a luxury; if they are not, that lowest gear becomes essential.

Summary

Surduc Pass rewards patience: a long, steady category 1 climb where holding a smart, threshold-aware rhythm over 26 km matters more than raw power. Respect the length, save something for the 17.25% ramp, and let the gearing carry you the rest of the way.

Length: 26 km
Average gradient: 5.08%
Max gradient: 17.25%
Start: 320 m
Summit: 1641 m
Net gain: 1321 m
Total ascent: 1322 m
Category: 1