Otto 12K

Race strategy

Short race: go all out.

• Hold your race pace up to 6.5km, but stay in control.
• Control your HR on the first mountain, and start the final descent from 6.5km 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.
• Work · 1.9km–6.5km · Climb of 425m, high point 1313m. This is where the race is built: steady, solid effort. Climb by heart rate or breathing, not pace.
• Home · 6.5km–12.4km · Descent of 549m averaging 9%. Kick for the line: give it everything you've got. Very long descent: first half under control, then even, let go only near the end.

Course

By gradient, 33% of the distance is uphill, 50% downhill and 17% flat. The longest climb runs 6.5km at an average 6.6% grade (425m of vertical). The longest descent runs 6.0km at an average 9.2% grade (549m of vertical). The steepest climb averages 15.1% over 0.6km. The steepest descent drops at 17.9% over 1.0km. Surface: 73% trail, 15% road, and 10% smooth. Flat-equivalent effort: 13.3 FlatKM.

Poles

Poles bring little benefit here: only about 1.9km of pole-friendly terrain.

Quad damage

Quad damage risk is low (index 10 of 100): a few descents worth noting, none of them decisive.

• Control your HR on the first mountain, and start the final descent from 6.5km under control, then go all out near the bottom.
• 6.5–12.4 km · 549 m D−, -9.2% · 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 13°C, with around 7°C at the highest point; the chance of precipitation is about 22%.

Results

224 finishers completed the 2025 edition. Men's winner: Jonas Marinao (Argentina) in 58:57. Women's winner: Jimena Aliotti (Argentina) in 1:11:54.