2006-II - Copa Mustang or Torneo Finalización 2006 was the 64th installment of the Mustang Cup. It began on the night of July 15, 2006 with the opening match between Atlético Nacional and Cúcuta Deportivo in Medellín at the stadium Estadio Atanasio Girardot. 18 teams compete against one another and played each weekend until November 12. At that point, the top 8 teams in the league stage advanced to the group stage, each group with 4 teams. From that point on the teams play on a home and away basis, for a total of a six matches each. The winner of both groups at the end advance to the home-and-away final.