Naku La

Naku La cycling climb profile

Naku La is an HC climb in IN, and the numbers explain why it needs to be treated with respect from the first pedal stroke. The climb runs for 16.8 km, rises from 3771 m to 5033 m, and gains 1262 m in elevation. The average gradient is 7.51%, which is already enough to make this a sustained climbing effort rather than a rolling ascent. The maximum gradient of 14.59% is the key warning: this is not a climb to pace only by its average.

How the gradient rides

With only the headline profile available, the safest way to understand Naku La is as a long, high, consistently demanding ascent with harder ramps embedded inside it. A 7.51% average over 16.8 km means the road spends a lot of time pointing up. The 14.59% maximum gradient tells you there are sections steep enough to punish overgearing or early enthusiasm.

The practical implication is simple: if you ride the opening kilometres as if the climb is just a steady 7.51%, the steeper pitches can turn the second half into damage control. The climb gains more than a vertical kilometre and finishes at 5033 m, so the cost of small pacing mistakes compounds as the road gets higher.

Pacing strategy

The right pacing model is controlled, not heroic. Start below the effort you think you can hold, especially if using /glossary/ftp as your anchor. On a climb this long, the goal is to preserve the ability to respond when the road tilts toward its maximum gradient rather than spending that capacity early.

Use the average gradient as a baseline, not a target. On the steadier sections, keep pressure smooth and avoid surges. On the steepest ramps, let speed fall before cadence collapses. Chasing a fixed speed is the wrong metric here because the climb’s difficulty is defined by vertical gain and gradient, not distance alone.

Gearing notes

Gear for the 14.59% maximum gradient, not the 7.51% average. A setup that feels comfortable on a normal climb can become limiting once the road gets steep and fatigue is already present. If cadence drops too far on the ramps, power spikes become unavoidable, and those spikes are expensive on a 16.8 km HC climb.

The best approach is to keep a low enough gear available that you can stay seated through the steeper sections without grinding. Naku La rewards patience: hold something sustainable, protect cadence, and treat the upper part as the real test rather than the place to discover you spent too much too soon.