Rangers in Wyoming's Grand Teton National Park were unable to determine if speed was a factor in the recent vehicle strike that killed a sub-adult grizzly bear on a park highway. The 5-year-old male bear,

A young grizzly bear from one of Wyoming’s most iconic bear families has died after being struck by a vehicle near Grand Teton National Park. Here’s what we know.

Grizzly bear 399 was hit and killed by a car on Highway 26/89 in Snake River Canyon south of Jackson, Wyoming, in October, McClatchy News previously reported. The 28-year-old mother grizzly was the oldest known reproducing grizzly bear in the Greater Yellowstone Ecosystem.