The couple were on the Grace Coolidge Trail and found themselves behind a group of about five bull bison, according to the Custer County Sheriff’s Office. The couple paused about 500 yards from the animals and waited for them to continue up the trail and out of sight. The couple then continued hiking, came around a corner and encountered the bulls at a distance of 50 yards.

The couple stopped again, and then continued trailing the bison as the animals moved away. A bull eventually broke from the group, charged the woman, hooked her and tossed her into the air. 

The woman died from her injuries.

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Custer State Park is managed by the Department of Game, Fish and Parks. Spokesperson Nick Harrington said staff moved the bison from the area and are monitoring the animal’s behavior “to ensure public safety and prevent future incidents.” He said dry conditions have caused bison to spread throughout the park in search of grass, increasing the chance that visitors may encounter them on trails.

Harrington said park visitors should keep their distance from wildlife, make noise while hiking, use caution around corners and ridges, and keep pets on leashes.

“It’s important to remember that bison are wild animals and need to be treated as such,” Harrington said in a written statement. “Visitors are reminded to keep their distance from all wild animals and safely enjoy both the trails and wildlife within the park.”

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On May 1, a 22-year-old hiker encountered a bison while hiking the Lost Trails by Center Lake, Harrington said in response to South Dakota Searchlight questions about prior incidents. The hiker was with a friend and their dog when they rounded a corner. 

“The hiker was struck by the buffalo on the back of her legs and was transported to a local hospital with non-life-threatening injuries,” Harrington said.

Harrington said the department is not aware of any other incidents involving bison within Custer State Park this year, and there had not been a fatal incident involving a bison in the park since 2001.

The 110-square-mile park in the Black Hills is home to a herd of about 1,400 bison, also known as buffalo. Bull bison can stand up to 7 feet tall at the shoulders, weigh 2,000 pounds and run up to 35 mph, according to the department.

South Dakota Searchlight is part of States Newsroom, the nation’s largest state-focused nonprofit news organization.