Paso internacional Los Libertadores is a climb of 45.5 kilometers (hors catégorie). Paso internacional Los Libertadores tops out at 3,210 m above sea level. It is located in Polvaredas, Mendoza, Argentina. The average gradient is 2.9% with a maximum of 12.4%. The climb has 1315 meters of elevation gain.
Difficulty analysis: This 45.5 km climb is a pure endurance test. The moderate average gradient of 2.9% hides a very uneven profile, with descending sections (KM 2-3, 5-6) and many flat stretches at 0-1%. The real difficulty lies in its length and in the last three kilometres (KM 38-41), where the gradient ramps up sharply (6%, 5%, then 8%), after more than 1100 m of elevation gain already in the legs.
Pacing advice:
1. Ride within yourself over the first two thirds: With many sections at low or negative gradient, hold a steady effort (RPE 5-6/10) to save your energy. Don't go all-out on the short pitches.
2. Save something for the hard finish: Keep some energy in reserve for the critical stretch between KM 38 and 41 (6% to 8% gradients). That's where the climb will be decided.
3. Manage your fueling: The expected duration of the effort (1h30 to 2h30+) calls for regular hydration and calorie intake from the very start.
For cyclists who have climbed the Paso Internacional Los Libertadores, the experience is described as unforgettable and grueling. The majesty of the Andean scenery, with its snow-capped peaks and jaw-dropping views, is consistently hailed as the ultimate reward after an intense effort. Riders describe a slow, demanding climb, where the altitude can be felt in both body and bike, but which gives you the time to fully soak up the raw beauty of the cordillera.
The difficulty doesn't lie in the elevation gain alone. Riders report that the road is heavily trafficked by trucks, which makes the climb demanding in terms of vigilance. The road surface is often described as uneven, with potholes and stretches in poor condition, especially on the Argentine side, so you need to ride carefully. The famous "Caracoles" descent on the Chilean side, with its 29 hairpin bends, is considered both spectacular and dangerous, demanding total control, especially in strong wind.
Beyond the physical effort, riders describe a human adventure defined by self-sufficiency and planning. Reports strongly advise bringing plenty of food and water, as there are no services over much of the route. The passage through the long Cristo Redentor tunnel is a key stage, often described as impressive but also thick with exhaust fumes.
Despite the logistical challenges and the harshness of the environment, the experience is unanimously considered unique and rewarding. The sense of accomplishment on reaching the pass at over 3,000 metres above sea level, after overcoming the elements and the difficulty, leaves a lasting memory. For these riders, climbing the Paso de Los Libertadores is far more than a simple ascent; it's facing the power of the Andes and living an extraordinary adventure that stays with you.
45.5 km • 1315 m D+
VAM: average climbing speed, based on elevation gain
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