Colla della Navonera cycling climb profile
Colla della Navonera is a long Italian category 1 climb that asks for discipline more than aggression. The headline numbers are 21.8 km at an average gradient of 4.85%, rising from 454 m to 1512 m. That makes it a climb where the main limiter is not one savage wall, but the cumulative cost of staying on the pedals for a long time while gaining 1058 m.
The important detail is the gap between the average gradient and the maximum gradient of 13.08%. A 4.85% average can look manageable on paper, but that figure smooths out the climb. With ramps above 13%, Colla della Navonera is not just a steady tempo drag. It has enough gradient variation to punish riders who pace it like a constant shallow climb.
How the gradient rides
From bottom to summit, the defining feature is duration. Over 21.8 km, even a controlled effort becomes expensive if you ride above threshold too often. The average gradient suggests long sections where a seated endurance or tempo rhythm is possible, but the maximum gradient tells you that the climb also contains moments where cadence and gearing will be tested.
That combination matters tactically. On a climb this long, the steepest ramps should be treated as places to limit losses, not places to prove form. If you surge hard every time the road tilts up, the cost will compound before the summit. The better approach is to let power rise slightly on the steeper pitches, but avoid turning those sections into repeated threshold or above-threshold efforts unless you are specifically training that system.
Pacing strategy
The cleanest pacing model is conservative at the start, steady through the middle, and only more assertive late if the legs are still responding. Because the climb gains more than a thousand metres, the early kilometres should feel almost too controlled. If they do not, the final part of the climb will likely become a grind rather than a progression.
For riders using power, this is a classic climb to anchor around /glossary/ftp without becoming a slave to the screen. Hold a sustainable climbing effort on the steadier gradients, then cap the spikes when the road reaches its steepest pitches. Heart rate riders should expect lag on the steeper ramps, so perceived exertion matters. If breathing becomes ragged early, the effort is probably too high.
Gearing notes
Bring gearing that respects the 13.08% maximum gradient, not just the 4.85% average. The average says the climb is rideable at rhythm. The maximum says you still need a low enough gear to stay seated and keep cadence from collapsing when the road bites.
That is the practical key to Colla della Navonera: ride the average, prepare for the ramps. The climb rewards riders who stay economical, keep pressure smooth, and avoid burning matches before the altitude gain has fully accumulated.