It is 13.8 kilometres long, it averages a little over eight percent, and it turns twenty-one times. Alpe d'Huez is not the highest climb the Tour de France uses, nor the steepest, nor the longest. It is simply the most famous, and in 2026 the race does something it has never done before: it finishes there on two consecutive days, on stages 19 and 20. Back-to-back Alpe d'Huez, a Grand Tour first.
The climb entered Tour history in 1952, when Fausto Coppi won the first mountain-top finish ever held there. It then disappeared from the race for a quarter of a century before returning for good in 1976, and it has since hosted some of the sport's defining afternoons. Each of the twenty-one numbered hairpins now carries the name of a stage winner — and because there are more famous winners than there are bends, the names have started doubling up.
The shape of the effort
For the rider, Alpe d'Huez is a particular kind of test. At thirteen-plus kilometres and eight percent, a strong amateur is looking at somewhere around forty to sixty minutes of climbing. That places the effort squarely in the territory governed by sustainable power — your functional threshold and the band just above it. This is not a climb won by a single explosive move and survived to the top; it is a climb that punishes anyone who starts above the power they can actually hold.
The hardest ramps come early, in the first few bends out of Bourg-d'Oisans, where the road tilts toward double figures before it settles. That is exactly where over-eager riders spend matches they will beg for two-thirds of the way up. The discipline is to climb to your number, not to the wheel in front of you — to let stronger riders go if their pace is above yours, and to ride the whole climb as one even effort rather than a series of heroic accelerations.
Use the bends
The twenty-one hairpins are a gift to pacing, and the pros use them as one. Each numbered corner is a checkpoint — a way to break a daunting climb into twenty-one manageable pieces, to settle the breathing on the brief flattening of each bend, and to measure the effort against the distance left. Count down from twenty-one. Hold the power. Eat and drink early, because a climb this long is decided as much by what is in the tank as by what is in the legs.
In 2026 the race will climb it twice in two days, which adds a final lesson — the one that runs through all of Tour history. Recovery between back-to-back mountain efforts is its own discipline. The rider who is still there on the second Alpe d'Huez will be the one who refuelled, slept, and rode the first one within themselves. The mountain rewards the patient. It always has.