Puerto Rico Highway 819 (PR-819) is a north–south rural road located between the municipalities of Toa Alta and Toa Baja in Puerto Rico.

[3] Due to its rural characteristics, PR-819 has a single lane per direction in the entire length.

In Toa Alta, this highway extends from its southern terminus at PR-861 junction between Ortiz and Mucarabones barrios to the Toa Baja municipal limit,[4] passing through several neighborhoods and crossing the Río Bucarabones in Mucarabones.

[5] In Toa Baja, the road continues to the north through Candelaria barrio, where it also serves as the main access to several neighborhoods, extending from the Toa Alta municipal limit to the northern terminus at PR-863 junction.

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