The bear was one of four cubs that emerged in 2020 with their mother, Grizzly No. 399, who was often called the world's most famous grizzly bear.

Grizzly 1058’s mother was Grizzly 399, a well-known bear that also lived in Grand Teton National Park. After Grizzly 399 was hit and killed by a car in October 2024, her death made headlines around the world and sent shockwaves through the Jackson Hole community.