Passo del Diavolo cycling climb profile
Passo del Diavolo is a long category 1 Italian climb that is more about duration than brute gradient. The headline numbers are clear: 30.2 km at an average gradient of 4.07%, starting at 306 m and topping out at 1536 m. That gives 1230 m of net elevation gain, with 1293 m of total ascent.
That difference between net gain and total ascent matters. With only 63 m separating the two figures, this is not a climb defined by repeated descents and re-accelerations. The road trends upward for a long time, which makes pacing more important than punch. You are not just managing steep ramps. You are managing the cost of staying on the pedals for more than 30 km.
How the gradient rides
The 4.07% average can make Passo del Diavolo look gentler than it will feel in practice. Over this length, a moderate average still accumulates a lot of work. The climb gains 1230 m from bottom to summit, so even if much of the road is rideable at tempo, the effort compounds steadily.
The maximum gradient of 9.37% is the warning label. The climb is not a uniform false flat. At some point, the road reaches gradients more than double the average, which means riders who pace only off the headline 4.07% risk being caught out when the pitch tightens. The smart interpretation is that Passo del Diavolo gives you enough easier gradient to stay controlled, but enough steepness to punish overgearing or early enthusiasm.
Because the available profile data does not identify where the steepest section sits, the safest approach is to ride the climb as if the hard ramps can arrive after fatigue has already built. That changes the pacing logic. The first priority is not speed early on. It is preserving the ability to respond when the gradient approaches its 9.37% maximum.
Pacing strategy
Treat Passo del Diavolo as a sustained aerobic climb with intermittent muscular demands. For most riders, the right effort is just below the point where breathing and leg load begin to drift upward uncontrollably. If you ride with power, anchor the first long portion around a sustainable climbing intensity rather than chasing speed. A climb this long rewards even pacing more than surges. See /glossary/ftp if you use threshold power to set targets.
The key mistake is letting the moderate average gradient convince you to push a big gear early. On a 30.2 km climb, small inefficiencies become expensive. If cadence drops every time the road steepens, the cost shifts from aerobic to muscular, and that is where the later kilometres become difficult.
Gearing notes
Use gearing that lets you stay seated and smooth when the gradient rises toward 9.37%. The average gradient does not demand extreme climbing gears by itself, but the length and maximum pitch do. A lower gear is not just insurance for the steepest ramps. It protects cadence, reduces torque spikes, and helps keep the effort repeatable all the way to 1536 m.
The best ride on Passo del Diavolo will feel almost restrained at the bottom. Let the climb come to you, keep pressure steady through the long middle, and save the harder effort for the sections where the road finally asks for it.