Collado del Burro cycling climb profile
Collado del Burro is a short, controlled Category 3 climb in Spain that rewards discipline more than survival climbing. At 3.4 km with an average gradient of 6.21%, it sits in the awkward zone where the effort is long enough to hurt if ridden too hard from the base, but short enough that stronger riders will be tempted to treat it like one sustained acceleration.
The climb starts at 404 m and tops out at 617 m, gaining 213 m to the summit. That tells the basic story: this is not an alpine grind where altitude or duration becomes the central limiter. The challenge is keeping the effort smooth on a climb that averages moderately steep but reaches a maximum gradient of 9.06%.
How the gradient rides
With only 3.4 km to work with, Collado del Burro does not give much time to settle in. The 6.21% average suggests a climb that is generally steady rather than brutally irregular, but the 9.06% maximum matters. A ramp near that level is steep enough to drag power above target if the rider stays seated in the wrong gear or tries to hold speed rather than effort.
That is the key tactical feature here. The average gradient may look manageable on paper, but the short length compresses the work. Any early surge has a cost, because there is not enough distance for a real reset before the summit. The best ride is one where the opening feels slightly restrained, the middle is held at a firm and repeatable pressure, and the final section is where the effort is allowed to lift.
Pacing and gearing
For pacing, use the average gradient as the anchor and the maximum gradient as the warning. If riding by power, start below the number you think you can hold for the whole climb, then build once the rhythm is established. Riders using /glossary/ftp should avoid treating the first steep pitch as proof that the climb demands a new target. It is usually better to let speed fall briefly than to spike power and pay for it over the remaining distance.
Gearing should be chosen for cadence insurance. A compact or climbing-friendly setup is not about fear of the 6.21% average; it is about staying smooth when the road tilts toward 9.06%. If you have to grind those steeper moments, the climb becomes more muscular and less aerobic, which is exactly how a short Category 3 ascent can feel harder than its headline numbers suggest.
Ride strategy
The cleanest approach is simple: enter the climb settled, keep the first half controlled, shift early on the steeper ramps, and only commit fully once the summit is close enough that a fade no longer matters. Collado del Burro is not long, but it is steep enough to expose impatience.