The 2004-2005 season became a milestone in the history of CA Osasuna. With a solid squad and a coaching staff led by Javier Aguirre, the team displayed outstanding performance in the Copa del Rey, overcoming several rivals, including top-flight teams, with a game characterized by intensity and cohesion.

The journey to the final began with an exciting match against Real Betis, where Osasuna managed a draw in the first leg and a victory in the second leg, securing their spot in the quarter-finals. In the semi-finals, they faced Sevilla FC, a traditionally strong rival. Despite the difficulties, Los Rojillos surprised the football world with a heroic performance, highlighted by the skill of players like Walter Pandiani and the infallible goalkeeper Ricardo López.

The grand final took place on June 11, 2005, at the Vicente Calderón Stadium, where Osasuna faced Real Madrid. Although they did not achieve victory, reaching the final was a triumph for the fans and the club. The stadium was filled with Osasuna supporters who traveled from Pamplona to support their team in this historic event. The atmosphere was electric, with chants echoing and a palpable passion uniting everyone present.

The final was not merely a match but a symbol of the struggle and perseverance of a club that had worked hard to reach that moment. Although the result was not what they hoped for, the experience left an indelible mark on the club's history and in the hearts of its supporters. This achievement is remembered as a moment of pride, demonstrating that Osasuna, a club from a small city, could compete and shine on the biggest stage of Spanish football.

The 2004-2005 season not only put Osasuna on the map of Spanish football but also cemented a special connection between the club and its fans, a bond that endures to this day. Los Rojillos continue to carry that passion and fighting spirit in every match, always remembering the feat of 2005 as a glorious chapter in their history.