The basic outline of Hugh Glass's story is true. But like many historical tales passed down over time, there could be variations and additions in different retellings.
Yes, the story of Hugh Glass is based on real events. However, some details might have been embellished or changed for dramatic effect.
The story of Hugh Glass has a foundation in truth. But keep in mind that when turned into a popular narrative, certain elements might be exaggerated or fictionalized to make it more captivating.