It forms the southern boundary of the Lajas Valley and it is bordered by La Parguera in the Caribbean Sea coast.

[citation needed] The Sierra Bermeja is the nesting place of many species that feed in the Laguna Cartagena.

As a result, the Sierra provides the requirements for a large quantity of wildlife established in the area, many of it endangered.

[1] In June 2018, funds were earmarked for universities in Puerto Rico to use for research of the Sierra Bermeja region.

[3] Local folklore surrounding the area says there is a secret UFO base somewhere in the Sierra Bermeja.