The Urantia Book teaches us that the story of Noah's ark is a fable:
Noah, however, was a real person, and this paragraph explains, perhaps, how he became connected with this story:
78:7.4 The traditions of a time when water covered the whole of the earth’s surface are universal. Many races harbor the story of a world-wide flood some time during past ages. The Biblical story of Noah, the ark, and the flood is an invention of the Hebrew priesthood during the Babylonian captivity. There has never been a universal flood since life was established on Urantia. The only time the surface of the earth was completely covered by water was during those Archeozoic ages before the land had begun to appear.
You can read more about Noah and the origins of this fable in The Floods in Mesopotamia
78:7.5 But Noah really lived; he was a wine maker of Aram, a river settlement near Erech. He kept a written record of the days of the river’s rise from year to year. He brought much ridicule upon himself by going up and down the river valley advocating that all houses be built of wood, boat fashion, and that the family animals be put on board each night as the flood season approached. He would go to the neighboring river settlements every year and warn them that in so many days the floods would come. Finally a year came in which the annual floods were greatly augmented by unusually heavy rainfall so that the sudden rise of the waters wiped out the entire village; only Noah and his immediate family were saved in their houseboat.
I want to thank you again for writing to us with your questions. I hope that my reply has been helpful, and that you'll be inspired to read further about Adam and Eve and their mission, and the subsequent results of that mission. Even though it was a partial failure, due to default, the Violet race did gain a foothold in the races of mankind.