163km across the Sierras Grandes — one of South America's hardest 100-milers
A brutal 163km crossing of the Sierras Grandes de los Comechingones, traveling from the Calamuchita Valley over Cerro Champaquí (2884m — Córdoba's highest peak) and deep into the remote Traslasierra Valley before returning. Runners navigate non-tourist wilderness terrain for hours at a stretch, with 14 aid stations spread over a 42-hour window. Semi-self-sufficiency and self-evacuation are mandatory — in case of abandonment due to fatigue, rescue from remote sections can take 24 hours or more. With only ~42% of starters finishing, this is one of the most demanding 100-milers in South America. A Western States 100 qualifier.
Recommended for seasoned ultrarunners
Villa Yacanto de Calamuchita, Córdoba, ArgentinaOctober 10, 2026
Must meet custom qualifier requirements within the qualification window
Minimum ITRA Performance Index required: 420 points (women) / 460 points (men). Must submit sports CV (last 3 years of ultra finishes with time, distance, D+, and year) plus ITRA Performance Index screenshot via WhatsApp to race director Tania Díaz (+54 9 3546 430059). Race director evaluates applications individually before granting registration access.
| Location | km | Elevation |
|---|---|---|
Start Start | 0.0 | 1,131 m |
Finish Finish | 142.9 | 1,129 m |
Sign in to see cutoffs, crew access, drop bags, and services for every aid station.
Course summits Cerro Champaquí at ~2840m and traverses high-altitude terrain for several hours
October nighttime temperatures drop below freezing above treeline; river crossings involve cold water at altitude
Mountain weather in the Sierras Grandes changes rapidly; rain, wind, and brief snow possible at elevation in October
Afternoon thunderstorms possible on exposed high-altitude sections
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