Amie Adamson, from Derby, Kansas was running when she was killed by the bear on a trail west of Yellowstone National Park on Saturday.
Gallatin County Coroner’s Office said the 48-year-old died from exsanguination due to a bear mauling.
“At the time of her death, [Adamson] was hiking or running on the trail and would often do so in the early morning. After investigation, the bear attack did not appear to be predatory,” they said on Facebook.
Rangers issued an emergency closure of the area, which is popular with hikers.
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The attack comes amid a rise in Montana’s grizzly bear population and an increase in sightings.
The department put out a news release last week warning visitors that staff had confirmed grizzly bear sightings throughout the state, “particularly in areas between the Northern Continental Divide and the Great Yellowstone ecosystems”.
They implored those camping and visiting parks to carry bear spray, store their food while outside and tend to their garbage.
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