Rise, congratulations on winning the contest! In a funny coincidence, I finally bought João Guimarães Rosa's book yesterday in a Spanish translation executed by Ángel Crespo: it's called Gran Sertón: Veredas (Alianza Editorial, Madrid, 1999). Hope to get to it next month but it will more likely be November. Cheers!
Gracias, Richard. It was said that the book's translations in other languages (French, German, Spanish, Italian) are superior to the English one. You may be in for a treat.