How long is a life cycle of grizzly bear?

Grizzly bears typically live for 25 to 30 years in the wild, although some have been known to live for as long as 35 years. Grizzly bear cubs are born in the winter, and they typically stay with their mother for two to three years. After they leave their mother, grizzly bears live on their own until they are around five or six years old. They reach sexual maturity at around seven or eight years old, and they can start to reproduce. Once a grizzly bear reaches adulthood, it will typically live for 15 to 20 years. The main causes of death for grizzly bears are hunting, habitat loss, and conflicts with humans.