Portella de Meranges

Portella de Meranges Cycling Climb Profile

Portella de Meranges is an HC climb built around duration first, then steepness. On paper, 32.3 km at 5.8% looks controlled rather than brutal, but that average sits alongside a maximum gradient of 22.66%. That gap is the main story of the climb. This is not a simple metronomic ascent where the same gear and power carry you cleanly from bottom to top.

The climb starts at 1023 m and finishes at 2898 m, gaining 1875 m from base to summit. Over that length, the average gradient tells you the road spends plenty of time below the headline maximum, but the 22.66% pitch means there are sections where momentum, gearing, and restraint matter more than raw enthusiasm.

How the Gradient Rides

The defining feature is contrast. A 5.8% average across 32.3 km is already a meaningful endurance load, especially because the climb finishes far above where it starts. But the maximum gradient changes the way the whole ascent should be ridden. Even if the steepest section is short, it forces a different pacing model: you need to keep enough margin to handle sudden ramps without spiking deep into the red.

That means the lower and middle parts should be treated as setup, not as a place to prove form. If you ride the average gradient too aggressively early, the climb can feel manageable right up until it is not. The severe pitches will punish a rider who has been sitting near threshold for too long.

Pacing Strategy

The safest approach is to ride the majority of the climb below FTP, letting the average gradient do the damage slowly rather than adding unnecessary surges. Think of the 32.3 km length as the primary constraint. The 22.66% maximum is the tactical constraint.

A good pacing plan is simple:

• Start conservatively, even if the early road feels rideable.
• Keep cadence and breathing stable on the steadier gradients.
• Treat the steepest ramps as short controlled over-threshold efforts, not attacks.
• Recover immediately when the gradient eases instead of trying to hold the same speed.

On a climb this long, the rider who avoids repeated spikes usually beats the rider who chases every change in gradient.

Gearing Notes

Bring climbing gears with real bailout range. The average of 5.8% might tempt a rider into thinking standard gearing is enough, but the listed maximum of 22.66% argues strongly against that. Compact gearing or a wide-range cassette makes the climb easier to pace because it lets you keep turning the pedals when the road tilts sharply upward.

The practical goal is not to find one perfect gear for Portella de Meranges. It is to avoid being forced into a low-cadence grind on the steepest sections after already carrying more than 1800 m of vertical gain. If the gearing lets you stay seated and controlled through the hard ramps, the whole climb becomes less stochastic and more manageable.

Bottom Line

Portella de Meranges is a long HC ascent where the average gradient understates the tactical difficulty. Ride it as a sustained endurance climb with intermittent severe ramps. Respect the distance, gear for the maximum, and keep enough in reserve to handle the steep sections without turning the final part into survival.