Adange Pass

Adange Pass cycling climb profile

Adange Pass is a serious HC climb because the difficulty is not hidden in one headline number. The climb runs for 17.8 km, averages 10.02%, gains 1787 m net elevation, and starts at 546 m before reaching 2333 m. That combination tells you most of what you need to know before turning a pedal: this is not a climb where you wait for one decisive steep section. The pressure is there from bottom to summit.

The average gradient is the key figure. Over this distance, 10.02% is not just steep - it is mechanically and metabolically expensive. The climb demands a low gear, a stable cadence, and the discipline to stay under control early. If you ride the opening as if the average will soften later, the 1812 m of total ascent will punish that decision.

How the gradient unfolds

The stats point to a climb with very little relief. Total ascent is only slightly higher than net elevation gain, which suggests the road is overwhelmingly uphill rather than broken by meaningful descents. That matters tactically. On a rolling climb, riders can recover over crests or use flatter sections to reset. On Adange Pass, the profile leaves much less room for that kind of recovery.

The listed maximum gradient of 25.14% is the other defining feature. Even if the climb averages 10.02%, ramps above a quarter gradient change the ride completely. They force torque spikes, disrupt cadence, and make poor gearing choices obvious very quickly. On those sections, the aim is not to attack the climb. It is to get over the steepest pitch without burning matches that are needed later.

Pacing and gearing notes

Adange Pass should be paced like a long threshold-adjacent effort with survival sections layered into it. Use your /glossary/ftp as a ceiling, not a target from the base. The safest strategy is to start slightly conservative, hold the easiest sustainable rhythm through the main body of the climb, and accept that the steepest ramps will temporarily lift effort above plan.

Gearing is not optional here. Bring a true climbing setup, not a compromise road gear. The 10.02% average already justifies it, and the 25.14% maximum makes it essential. If your easiest gear only works when you are fresh, it is not easy enough for this climb.

The practical goal is to keep cadence from collapsing. Once cadence drops too far on a climb this steep, power becomes more muscular, breathing becomes less controlled, and every acceleration costs more. Stay seated where possible, stand briefly to clear the steepest ramps, then return immediately to a rhythm you can repeat for the rest of the 17.8 km.