|Countries||Dominican Republic, Haiti|
|Provinces||Dajabón, Monte Cristi, Nord-Est Department|
|Municipalities||Loma de Cabrera, Dajabón|
|Cities||Loma de Cabrera, Dajabón, Ouanaminthe|
|- location||Pico de Gallo, Cordillera Central, Dominican Republic|
|- elevation||1,205 m (3,953 ft)|
|- elevation||0 m (0 ft)|
|Length||55 km (34 mi)|
|Basin||380 km² (147 sq mi)|
|Discharge||for Don Miguel, south of Dajabón|
|- average||2.84 m³/s (100 cu ft/s)|
The Taíno name of the river was Guatapaná but the Spanish people that came to live in the Hispaniola island called it Dajabón after the Taíno name of the region (Dahaboon). Because this river was the border between the two colonies of the island, there were many fights during the 16th and 17th centuries and many people died here; then the French people began to name the river Massacre, written sometimes Masacre in Spanish; massacre means the killing of many people.
The source of the Dajabón is at the Pico de Gallo mountain, on the northern side of the Cordillera Central mountain range. It flows through the Dajabón province and then form part of the limits between Haiti and the Dominican Republic. Its mouth is in the Manzanillo Bay, on the Atlantic Ocean.
The river Capotillo is part of the northern border between Haiti and the Dominican Republic until it joins the river Dajabón between the cities of Loma de Cabrera and Dajabón. Then the border follows the course of the river Dajabón.
- De la Fuente, Santiago (1976). Geografía Dominicana (in Spanish). Santo Domingo: Editora Colegial Quisqueyana. p. 134.
- Rodríguez, Cayetano Armando (1976). Geografía de la Isla de Santo Domingo y Reseña de las Demás Antillas, Second Edition (in Spanish). Santo Domingo: Sociedad Dominicana de Geografía, Vol. XI. p. 399.
- González, Geraldino (1992). Ríos y Arroyos de la República Dominicana (in Spanish). Santo Domingo: Editora Educativa Dominicana. p. 42.