Alto del Buitre cycling climb profile
Alto del Buitre is an HC climb built around accumulation. On paper, 48.4 km at 5.35% average does not look savage in the way a short wall does, but that reading misses the main point. The climb starts at 933 m and finishes at 3,523 m, gaining 2,590 m net, with 2,756 m of total ascent. That tells you this is not a climb defined by one decisive ramp. It is a long, altitude-reaching effort where fatigue compounds quietly until the summit section asks for whatever is left.
How the gradient unfolds
The average gradient of 5.35% suggests a broadly rideable climb, but the 13.3% maximum gradient matters because it forces pacing and gearing discipline. This is not a climb to ride on average gradient alone. A rider who gears only for steady 5% to 6% climbing risks being over-geared when the road kicks up.
The relationship between net elevation gain and total ascent is also useful. Total ascent is 166 m higher than net gain, which points to a route that is overwhelmingly uphill, but not mathematically smooth from bottom to top. There are likely enough flatter, rolling, or briefly negative sections to interrupt rhythm without giving back much real recovery. That kind of profile can be deceptive: the legs get small moments of relief, but the climb continues to extract energy for nearly the full 48.4 km.
The lower slopes should be treated as the opening phase of a much longer problem. The middle portion is where the steady average can lull riders into riding slightly too hard. By the time the climb reaches its upper elevations, the summit at 3,523 m adds another constraint. Power that felt controlled lower down can become harder to sustain, not because the gradient has necessarily changed, but because the environment and accumulated fatigue have.
Pacing and gearing
The correct pacing model is conservative early, controlled through the middle, and only selective near the top. For most riders, this means staying below threshold for a long time rather than chasing speed on every steeper section. If you use /glossary/ftp as a pacing anchor, Alto del Buitre rewards restraint: the cost of going too deep early is paid back over an unusually long distance.
Gearing should be chosen for the 13.3% maximum gradient, not the 5.35% average. A compact or climbing-friendly setup makes sense because the goal is not just to clear the steepest pitches, but to clear them without spiking torque and heart rate. Cadence preservation matters here. Grind too often early, and the final elevation gain becomes much more expensive.
Use the flatter or easier sections to settle breathing and fueling, not to surge. The climb’s length makes nutrition part of the pacing plan, and the summit elevation means small mistakes feel larger late. Alto del Buitre is best ridden as a patient endurance climb with a hard ceiling on early effort. If the legs are still responsive near the top, that is where time should be spent.