Grizzly bear No. 399 and her four cubs cross a...

Grizzly bear No. 399 and her four cubs cross a road as Cindy Campbell stops traffic in Jackson Hole, Wyo., on Nov. 17, 2020. Credit: AP/Ryan Dorgan

JACKSON, Wyo. — The driver who struck and killed a famous grizzly bear south of Grand Teton National Park earlier this week was not speeding and the bear's death was an accident, law enforcement officers said Friday.

The death of grizzly No. 399 on Tuesday night in the Snake River Canyon south of Jackson saddened tourists, wildlife biologists and amateur and professional photographers who for years studied and captured images of the bear and her many cubs and followed her comings and goings on social media sites.

“The bear stepped right out into the road," Lincoln County Sheriff's Patrol Lt. John Stetzenbach told the Jackson Hole News & Guide on Friday. The driver "was unable to brake in time to avoid the bear, and the collision occurred.”

He said the collision "truly was an accident” and that the driver was not speeding or distracted and was not cited. The Subaru that hit the bear had to be towed from the scene, Stetzenbach said.

He declined to identify the driver, noting some online comments blamed the driver for the bear's death.

At 28 years old, No. 399 was the oldest known reproducing female grizzly in the Yellowstone ecosystem. Each spring, wildlife enthusiasts eagerly awaited her emergence from her den to see how many cubs she had birthed over the winter — then quickly shared the news online. The bear had 18 known cubs in eight litters over the years, including a litter of four in 2020. She stood around 7 feet (2.1 meters) tall and weighed about 400 pounds (180 kilograms).

Named for the identity tag attached to her ear by researchers, the grizzly was often seen near roads in Grand Teton, drawing crowds and creating traffic jams.

This photo provided by Grand Teton National Park shows Grizzly...

This photo provided by Grand Teton National Park shows Grizzly bear No. 399 and her one-year-old cub after emerging from hibernation, May 16, 2023. Credit: AP/C. Adams

Grand Teton bear biologist Justin Schwabedissen said Thursday that he believes her yearling cub, which was apparently not struck, will survive on its own.

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