The 1909 edition was contested by 11 clubs, 7 within Buenos Aires Province, and 4 from Liga Rosarina de Football. Playing in a single-elimination tournament, San Isidro eliminated Quilmes 2–1 and then Porteño 2–0 at Palermo in the tiebreaker match after both teams had tied 1–1. San Isidro did not play the semifinals, advancing directly to the final game.[5][1]
On the other hand, Estudiantes eliminated Tiro Federal 4–2 in their venue in Palermo. Porteño then defeated Newell's Old Boys 3–2 also in Palermo, then beating River Plate 3–1 in Dársena Sur to earn their place as finalist.[1]
In the final, San Isidro got a landslide victory over Estudiantes, beating them 8–1[2] at Estadio GEBA in Buenos Aires to win their first Copa de Honor trophy.[6][1]