The UltraTrail "Alma Guaraní" Arasunu 2017 is an ultramarathon race of medium and long distance competitive that consists of crossing a marked route of 21, 42, 80 and 140 kilometers of length approximately and with limit of stipulated time to cross the goal. It will be developed in Paraguay in the Paraguarí Department, encompassing the cities of Paraguarí, Piribebuy, Escobar, Sapucai, Caballero, Yaguaron. We emphasize that this 4th edition of Ultratrail race has one of the most difficult routes currently. The race will be characterized by continuous unevenness. Arasunu is the first organization to include within the 140km route two stretches of zip line inside the Mbatovi reservation. UTA 2017 is organized by the sports group ARASUNU ECOAVENTURA TEAM, current member of the International Trail Running Association ITRA.