1979 (13 June):Asociación Deportiva Belén is founded. A.D. Belen will go on to become the second team in the province of Heredia to participate in Primera División the First Division of Costa Rica.
1987: Using the name "Belén-Calle Flores" (Bethlehem, Street of Flowers), Belén wins the title of the National Association of Soccer as well as the title of the National Association of Amateur Soccer (ANAFA), and is placed in Segunda División de Costa Rica, the Second Division of Costa Rica, under the leadership of head coach Enrique "Quique" Vasquez.
1993: Belén, led by coach Armando Rodríguez, is proclaimed Division II National Champion defeating Sagrada Familia 4–2 in the final round.
1993–94: A.D. Belén officially debuts in Primera División, Division I, and plays in the old national stadium but loses to Deportivo Saprissa 4–1. Belén talent Eusebio Montero wins the World Youth Cup in Saudi Arabia.
1995–96: Head coach Alexander Guimaraes guides Belén to a fifth-place finish in the championships as the team wins 50% of its games. This is Belén´s best finish in Division I. 1996–97 head coach Carlos Santana will match this feat.
1998: The entire community of Belén receives honor when A.D. Belén participates for the first time in an international competition, the CONCACAF Winners Cup. In the first phase, under coach "Quique" Vasquez, Belén eliminates Diriangen Nicaragua (2–1 and 3–2). But in the second stage the team stumbles to rival Olympia Honduras (3–0).
2003: Under strategist Mario Solis, A.D. Belén ascends to Division I again following the team´s triumph over Cartagena in the final.
2004–05: Belén drops back down to the second division. The last head coach in the premier division is Benjamin Mayorga.
2010–11: Led by Vinicio Alvarado and playing at Polideportivo de Belén, Belén Siglo XXI wins "El Campeonato de la Liga de Ascenso," the National Championship of the League of Ascension, defeating Cartagena, 3–0. And the team is promoted back to Division I.
2011 (31 July): A.D. Belén begins competing in Torneo de Invierno Campeonato Nacional de Invierno, the Winter National Championship Tournament, now under the name Belén Bridgestone F.C.