Paso de Lajas cycling climb profile
Paso de Lajas is a category 4 climb that rewards restraint more than force. At 4.7 km with an average gradient of 3.14%, it is not steep enough to demand survival pacing, but it is long enough that riding it like a false flat can quietly push you over threshold before the top.
The climb starts at 223 m and finishes at 370 m, with a listed net elevation gain of 147 m. The maximum gradient is 5.53%, which tells you the key tactical point: there are no extreme ramps in the data, but the climb still has enough bite to punish a rider who over-gears or surges too early.
How the gradient rides
With an average gradient just over 3%, Paso de Lajas should feel more like a sustained drag than a classic mountain climb. The effort is likely to sit in that uncomfortable middle ground where speed stays relatively high, drafting can still matter if you are in a group, and small pacing errors accumulate because there is not much gradient to force everyone into the same rhythm.
The listed max gradient of 5.53% suggests the hardest sections are firm rather than severe. That matters for how you ride it. On a climb like this, the decisive cost is not one isolated steep pitch. It is the temptation to keep pressing a large gear because the road never looks especially threatening.
The data lists 132 m of total ascent alongside 147 m of net elevation gain, so the exact vertical accounting is less important than the broader profile: short, shallow, and steady enough to be ridden efficiently if you avoid unnecessary accelerations.
Pacing strategy
Treat Paso de Lajas as a controlled aerobic climb with room to build. The best approach is to start slightly under your target effort, settle into rhythm through the middle, then lift only once you are confident the summit is within reach. Because the average gradient is modest, a hard opening can feel manageable for the first few minutes, but it can still push you above sustainable power without the obvious warning signs of a steeper climb.
If you are pacing by /glossary/ftp, this is a climb where smoothness matters. Hold pressure through the easier grades rather than spiking power on every firmer section. The time lost by staying composed early is usually smaller than the time lost by fading late.
Gearing notes
You should not need ultra-low climbing gears for the numbers shown here, but do not turn it into a strength effort by choice. A gear that lets you maintain a comfortable cadence over the 5.53% maximum gradient is the sensible setup. If your cadence drops sharply on the steeper moments, shift earlier rather than grinding and carrying muscular fatigue into the final part of the climb.
For racing or a hard training effort, Paso de Lajas is the kind of climb where positioning and momentum can matter as much as pure climbing ability. Stay efficient, avoid unnecessary surges, and use the shallow profile to keep speed high without letting the effort drift out of control.