The history of Lumambayan and Pinamalayan used to begin with the legend of the rainbow with the accounts of the town before the Marinduque settlers either rejected or taken seriously. Local histories written identified the beginning of Lumambayan with the migration of the said settlers and typified the course of its development with the enterprises of settling Marinduque elites including Morente’s, Madrigal’s, Benitezes, Aguiluchos and the Medinas. Nevertheless, the unavailability of sufficient historical records limits the written scope of its history.
It lies at the northern part of Pinamalayan. It is bounded on the east by Tablas Strait on the west by barangay Sta. Isabel, on the south by barangay Wawa and on the north by barangay Guinhawa.
The barangay has 1 Day Care Center, Public Elementary School, Barangay Hall, Multi-Purpose Hall, Senior Citizens Hall, 3 Basketball Courts and Barangay Health Center.