Salta: women can also be gauchos 1
"Gaucho (gaúcho in Portuguese, gaucho in Spanish) is a term commonly used to describe residents of the South American pampas, chacos or Patagonian grasslands, found principally in parts of Argentina, Uruguay, Southern Chile and Southern Region, Brazil. In Brazil it is also used to designate people from the state of Rio Grande do Sul.
The word gaucho could be described as a loose equivalent to the North American "cowboy" (vaquero, in Spanish). Like the North American word cowboy, Venezuelan or Colombian llanero, or Chilean huaso, or the Mexican charro (Vaqueiro is also a word used in Brazil), the term often connotes the 19th century more than the present day; then gauchos made up the majority of the rural population, herding cows on the vast Estancias, and practicing hunting as their main economic activities. The word "gaucho" is sometimes used to refer to chimichurri, a steak sauce common to Argentina." Source: wikipedia
In Salta province, Argentina, gauchos wear their traditional red and black ponchos with leather hats. It their very distinctive outfit. Nowadays they wear for celebrations and special days like the one when the photo was taken. They were about to parade in honor of the virgin mary.