Nahuel Huapi 33K

Race strategy

Run easy on the first mountain, then go all out on the second.

• Steep 26% wall. Control your pace and stay focused.
• Final 687m descent. Save your legs to go all out on it.
• Control your HR on the first mountain, then run your race pace, and start the final descent from 27.5km under control, then go all out near the bottom.
• Start · 0.0km–1.9km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
• Settle in · 1.9km–5.9km · Plus 1 more climb. Ease in: hold back more than feels necessary. The race is still ahead. Climb by heart rate or breathing, not pace. Hike the steepest pitches.
• Work · 5.9km–27.5km · Climb of 600m. Plus 1 more descent. This is where the race is built: steady, solid effort. Climb by heart rate or breathing, not pace. Running pays off here: run wherever you can.
• Home · 27.5km–36.0km · Descent of 687m averaging 8%, high point 1418m. No heroics: settle back into your own effort and hold it to the line. Very long descent: first half under control, then even, let go only near the end.

Course

By gradient, 27% of the distance is uphill, 34% downhill and 39% flat. The longest climb runs 5.9km at an average 4.4% grade (262m of vertical). The longest descent runs 8.5km at an average 8.1% grade (687m of vertical). The steepest climb averages 37.4% over 0.4km. The steepest descent drops at 24.7% over 0.4km. Surface: 74% trail, 17% smooth, and 8% road. Flat-equivalent effort: 47.9 FlatKM.

Poles

Poles bring little benefit here: only about 4.5km of pole-friendly terrain.

Quad damage

Quad damage risk is low (index 19 of 100): a few descents worth noting, none of them decisive.

• Control your HR on the first mountain, then run your race pace, and start the final descent from 27.5km under control, then go all out near the bottom.
• 27.5–36.0 km · 687 m D−, -8.1% · 0.0 km ahead → even, first half under control, let go at the end

Weather

On race day, start temperatures have historically ranged from 5°C to 14°C, with around 11°C at the highest point; the chance of precipitation is about 22%.

Results

779 finishers completed the 2025 edition. Men's winner: Javier Mariqueo (Argentina) in 2:52:24. Women's winner: Silvia Gonzalez Victorica (Argentina) in 3:38:03.