2026 Buenos Aires Argentina Marathon

The 2026 Buenos Aires Argentina Marathon is scheduled for May 2, 2026, serving as the inaugural leg of the "South America Challenge." Located in Buenos Aires, Argentina, the race takes place within the Reserva Ecológica Costanera Sur, a tree-lined urban ecological reserve featuring paved, flat paths along the riverfront. Participants can expect mild autumn weather in Buenos Aires during early May, with typical temperatures ranging from a cool 10°C (50°F) at night to a pleasant 18°C (64°F) during the day. This event is part of a self-organized, multi-city marathon tour spanning six countries in 11 days.

What is the South America Challenge itinerary?

The series consists of six road-style marathons across six countries from May 2 to May 12, 2026:

• →May 2: Buenos Aires, Argentina (Reserva Ecológica Costanera Sur)
• →May 4: Bogotá, Colombia (Parque El Virrey)
• →May 6: Santa Cruz, Bolivia (Parque Urbano)
• →May 8: Asunción, Paraguay (Parque Nu Guasu)
• →May 10: Montevideo, Uruguay (Calcagno Lake Montevideo)
• →May 12: Lima, Peru (El Olivar de San Isidro Park)

What is the race format and terrain?

• →All marathons are road-style events held on closed or park-loop circuits.
• →Courses are located in major city centers within public parks or urban green spaces.
• →The terrain is predominantly flat, utilizing paved paths, promenades, or bike paths.
• →Most courses are designed as multi-lap routes to complete the marathon distance.

What are the registration fees and limits?

• →Fees are kept very low to cover medals, bibs, and basic volunteer expenses.
• →Early-bird registration is capped at 20 runners per marathon on a first-come, first-served basis.
• →Registration closes once the 20-runner limit is reached or 2 days before the race.
• →There are no refunds provided.

What is the event schedule and timing?

• →Bib pickup and mandatory briefings: 5:00 p.m. at the host hotel the evening before each race.
• →Start time: Sunrise (approximately 6:00 a.m. local time), though exact times are subject to weather conditions and will be confirmed during briefings.
• →Time limit: A 9-hour cut-off is enforced ("No Runner Left Behind"), allowing for a pace of approximately 6:30–7:00/km.

What is included in the registration?

• →Official finisher medal.
• →Official results list.
• →Possible finisher certificate.

What equipment is required for timing?

• →Participants must use manual timekeeping in addition to a mandatory GPS watch or GPS device.
• →The GPS device must have a minimum battery life of 9 hours to verify the distance completed.

What are the nutrition and support requirements?

• →This is a self-supporting format.
• →There are no official aid stations provided; runners are responsible for carrying their own hydration and nutrition for the duration of the marathon.

What are the liability and visa responsibilities?

• →Participants are fully responsible for obtaining all necessary visas, permits, and medical insurance.
• →The organizers do not provide medical or insurance coverage.
• →As these are self-organized events, they may run without full public-road permits and could be subject to cancellation by local authorities.