It mainly consists of mangrove coasts, keys and floodplain forests, and it borders the Jobos Bay National Estuarine Research Reserve.

It was established in 1918 by Puerto Rico governor Arthur Yager to protect the mangrove forests areas between the municipalities of Guayama and Santa Isabel (Punta Petrona).

Batis maritima, Sesuvium portulacastrum and Sporobolus virginicus are the main grass species found in the area, particularly around the tropical salt ponds and keys.

[1] The forest is offers opportunities for bird watching, nature walks, camping and kayaking in designated areas.

[3] Additional visitors' information, interpretation and activities can be found at the Jobos Bay National Estuarine Research Reserve headquarters in Aguirre, Salinas.