The Regadera Formation (Spanish: Formación Regadera, E2r, Tpr) is a geological formation of the Bogotá savanna, Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes.

The predominantly sandstone and conglomeratic formation, with pink shale beds intercalated, dates to the Paleogene period; Middle to Late Eocene epoch, and has a maximum thickness of 765 metres (2,510 ft).

[1] The Regadera Formation consists mainly of quartz arenitic sandstone and conglomerates with some shale beds.

The age has been estimated, based on palynological data of Echitriporites trianguliformis var.

[3] The depositional environment has been interpreted as a braided river setting.