There is a tour operator that offers a 14-day raftride through the whole reserve. This is the only way of getting access to the deeper parts of the reserve. They enter the park from the south.
Sources and licences
Guide text adapted from the Wikivoyage article "Río Plátano Biosphere Reserve" by its contributors, available under CC BY-SA 4.0. Read on Wikivoyage · Contributors · CC BY-SA 4.0