Maratón Internacional de San Juan Half Marathon
Race Day Weather
Cold start — layer up, big temp swing
Runners will start in chilly 39°F conditions — dress in layers for the corral and plan to shed early. Temps will climb significantly to 68°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing. Moderate humidity at 70% is worth noting for effort level, especially in later miles.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Maratón Internacional de San Juan Half Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Half Marathon starts at the Rivadavia campground near the Quebrada de Zonda and runs downhill toward San Juan. The course passes the Zonda autodrome and the Jardin de los Poetas, then follows Avenida Libertador General San Martin along the Ruta del Sol through Rivadavia into the city. The final kilometers go past the Casa de Gobierno, Estadio Aldo Cantoni, Parque de Mayo, the Centro Civico, the Casa Natal de Sarmiento and the Catedral, and finish at the Teatro del Bicentenario. The course carries a World Athletics Grade B measurement certificate.
