Col de Doodad cycling climb profile
Col de Doodad is a compact Category 3 climb in the US, but the raw distance undersells the effort. At 3.2 km long with an average gradient of 7.2%, it is not a long endurance climb. It is the kind of ascent where the damage comes from intensity management: short enough to tempt riders into riding above threshold, steep enough to make that mistake expensive.
The climb starts at 2878 m and tops out at 3109 m, gaining 231 m from bottom to summit. That elevation context matters. Even if the gradient looks manageable on paper, the effort will feel sharper than the same profile closer to sea level, especially if you try to force the opening section rather than settling into a sustainable rhythm.
How the gradient rides
With an average of 7.2% and a maximum gradient of 9.47%, Col de Doodad is best read as a steady moderate-steep climb with harder pitches rather than a climb defined by extreme ramps. The max gradient does not suggest a wall, but it is close enough to double digits that momentum and cadence can disappear quickly if you are overgeared.
Because the climb is only 3.2 km, there is limited time to recover once you go too deep. The tactical mistake is treating it like a punchy rise and attacking the lower slopes. The better approach is to ride the first part at controlled pressure, let the gradient reveal itself, then lift the effort only once you know you can carry it to the summit.
Pacing and gearing notes
For pacing, anchor the effort around your climbing threshold rather than your best short-power number. If you know your /glossary/ftp, this is a climb where riding just under control early is usually faster than spiking over it and trying to survive the final minutes.
Gearing should give you a comfortable cadence at 7.2% while still leaving one bailout option for the 9.47% sections. That matters because the steepest pitches are not extreme, but they are steep enough to force a low-cadence grind if you arrive already loaded with fatigue.
Practical execution:
- Start seated and controlled, not reactive.
- Keep cadence smooth through the average 7.2% grade.
- Save a gear for the 9.47% maximum gradient.
- Treat the altitude from 2878 m to 3109 m as a reason to avoid early surges.
- Build the effort late rather than gambling from the base.
Col de Doodad is not about surviving a monster climb. It is about respecting a short, efficient test where gradient, elevation, and pacing discipline combine to reward riders who stay patient before committing.