Alto de la Lagunita

Alto de la Lagunita cycling climb profile

Alto de la Lagunita is a long category 1 climb in Argentina, and the headline number is not the average gradient. It is the combination of length and elevation gain. The climb runs for 27.1 km from 977 m to 2321 m, gaining 1344 m net, with 1447 m of total ascent.

That tells you the real demand: this is a sustained aerobic effort, not a short climb decided by one violent ramp. At 4.96% average, the gradient is manageable on paper, but over 27.1 km that manageable number becomes a pacing problem. A rider who treats the lower slopes as free speed will spend the upper part paying for it.

How the gradient unfolds

The available profile data gives an average gradient, not a detailed breakdown of each sector, so the smart reading is conservative. The climb rises steadily enough to gain 1344 m from bottom to summit, but the total ascent is 1447 m, which is 103 m more than the net gain. That difference points to a road that is not simply one uninterrupted ramp. There is likely some easing, variation, or elevation loss within the overall upward trend.

That matters tactically. On a climb like this, the flatter or easier moments should not be treated as invitations to surge. They are where you keep pressure on the pedals, recover slightly, and avoid turning a long threshold effort into a repeated series of accelerations.

Pacing strategy

The right approach is to ride the first part as if the climb is longer than it feels. Stay controlled, especially while the gradient feels close to the 4.96% average. This is a climb where perceived comfort early on can be misleading because the cost accumulates slowly.

Use /glossary/ftp as the anchor if you ride with power. The goal is not to prove strength in the opening kilometres, but to preserve the ability to lift effort late. If you are still breathing under control and holding a smooth cadence deep into the climb, you have paced it correctly.

Gearing notes

Choose gearing for duration first and steepness second. Since no maximum gradient is available in the data, it is better to arrive with an easier climbing gear than to assume the average tells the whole story. The safest setup is one that lets you stay seated and keep tension steady if the road pitches above the average.

The key is avoiding low cadence grinding too early. Alto de la Lagunita rewards riders who can keep the effort boring, efficient, and repeatable from the start elevation all the way to the summit.