Río Inabon

Río Inabón
Rio Inabon in Barrio Real in Ponce, Puerto Rico
Country	Puerto Rico
Region	Ponce
Basin features
Main source	Cerro Camacho, Barrio Anón, Ponce (near Jayuya) 4,100 feet (1,200 m)
River mouth	Caribbean Sea 0 feet (0 m)
Progression	Anón Real Coto Laurel Capitanejo
River system	Río Inabón
Basin size	38.18 sq mi (98.9 km2)
Tributaries	Left: Río Anón Right: Rio Guayo Quebrada Emajagua
Physical characteristics
Length	19.89 miles (32.01 km)
Discharge	Average rate: 15,000 cu ft/s (420 m3/s)

Río Inabón is a river in the municipality of Ponce, Puerto Rico. With a length of some 32.01 kilometers (19.89 mi), it is Ponce's second longest river after Río Jacaguas. It is fed by the Río Anón, Río Guayo (which itself is fed by the Chiquita Brook and the Indalecia Brook) and the Emajagua Brook. It is also fed by Río Bacas and Río de las Raices. This river is one of the 14 rivers in the municipality. Originating at an altitude of approximately 4,100 feet (1,200 m), it forms at the highest point of any other river in the municipality, and at one of the highest points of any river in Puerto Rico. With a watershed area covering 38.18 square miles, Río Inabon also has the second largest basin area of any of the municipality's 14 rivers after Rio Jacaguas.

Río Inabon has its origin at 4,100 feet (1,200 m) above sea level in Cerro Camacho, in barrio Anón, near Anon's boundary with the municipality of Jayuya. The river runs mostly parallel to PR-511.

"A provision in The Treaty of Paris of 1898 grants the Serrallés family exclusive rights to the Río Inabón. This river winds through Puerto Rico’s volcanic mountains, and is the exclusive water source for DonQ Rum". Today Río Inabón is one of the most popular rivers for swimming in southern Puerto Rico. Some 10 private reservoirs in the Ponce area are fed by the waters of Río Inabón.

In January 2011, Puerto Rico Representative Víctor Vassallo Anadón presented a bill into the Puerto Rico House of Representatives that would improve the sewer system of residents near the river to avoid contaminating it with sewer waters.

The fern Thelypteris inabonensis found at the headwaters of Río Inabon and at the Toro Negro State Forest has been identified by the U.S. Fish and Wildlife Service as an endangered species.