Myths are stories that explain objects or events in the natural world as resulting from some supernatural force or entity, most often a god.
Legends are stories coming down from the past, often based on real events. These are also often regarded as historical. Sometimes they may have certain parts that are fantastic or unverifiable.
Tall Tales are also Folk Tales. They are often lighthearted or humorous and contain highly exaggerated unrealistic elements.
Fairy Tales are stories that deal with mischievous spirits and other supernatural occurrences, often in a medieval setting.
An epic is a long story often told in verse involving heroes and gods. Epics have often been passed on orally and may have anonymous authors. Grand in length and scope, an epic provides a portrait of legends, beliefs, valves, laws, arts, and ways of life of a people.