Puerto Rico Highway 820 (PR-820) is an eastâÂÂwest road between the municipalities of Toa Alta and Vega Alta in Puerto Rico. With a length of , it extends from PR-823 in RÃÂo Lajas barrio to its intersection with PR-677 and PR-678 in Maricao barrio.
Puerto Rico Highway 820 is a rural road with a single lane per direction along its entire length. In Toa Alta, PR-820 leaves from PR-823, passing through Marzán neighborhood until the Vega Alta municipal limit. In Vega Alta, PR-820 has a short length from the Toa Alta municipal limit until its western terminus at PR-677 and PR-678 intersection. The entire length in Toa Alta is located in RÃÂo Lajas barrio, while in Vega Alta it is located entirely in Maricao barrio.