Were did the triceratops live

Triceratops fossils have been found in the US states of Montana, Wyoming, Colorado, and South Dakota and the Canadian provinces of Alberta and Saskatchewan, and date to between 68 and 65.5 million years ago. At that time the area was a subtropical, coastal floodplain at the edge of the Rockies with various river deltas. It was forested with plants such as conifers, cycads, ginkgoes, ferns, horsetails, and early angiOSperms such as primitive grasses and palm trees. There were occasional peat swamps there, too. The region had distinct wet and dry seasons, and sometimes suffered from drought. Since the time when Triceratops lived, the Rocky Mountains have been pushed up further, which is why we find their fossils in the mountains even though they lived in lowland areas.