What is the era of a triceratops?

The Triceratops lived during the Late Cretaceous period, approximately 68 to 66 million years ago. This era was characterized by the dominance of dinosaurs and the presence of diverse flora and fauna. Triceratops is one of the last dinosaur species before the mass extinction event that occurred around 66 million years ago, marking the end of the Mesozoic Era.