Yellowstone Bison Safety: Understanding the Risks of North America’s Largest Land Mammal
Bison in Yellowstone National Park are capable of accelerating to 35 mph, a speed that exceeds the men’s world record for the 100-meter dash. While often perceived as placid grazers, these animals, which can weigh up to 2,000 pounds and stand 6 feet tall, remain one of the most dangerous wildlife threats in the park. According to official reports, Yellowstone averages a couple of bison attacks annually, with at least two incidents recorded in 2025.
The Anatomy of a Bison Encounter
Carl McDaniel, 65, was injured in a July 10, 2025, incident at Bridge Bay Campground near Yellowstone Lake. McDaniel, who was walking with his grandson at the time, noted that the animal showed no initial signs of aggression before selecting him as a target. “He wasn’t showing aggression or anything like that until it picked a target,” McDaniel stated in a video recorded from his hospital bed at Bozeman Health Deaconess Medical Center.
Did you know?
Bison are the largest land animals in North America. Their ability to accelerate rapidly makes them difficult to evade once they begin a charge.
Assessing Injuries and Survival After a Charge
Following the attack, McDaniel was treated for multiple bone fractures. Dr. Eric Lowe of the Bozeman Health emergency department confirmed the severity of the injuries in a video posted to Instagram. McDaniel reflected on the mechanics of the encounter, noting that the physical trauma was not solely from the bison’s horns. “I didn’t get bruises from him launching me in air,” McDaniel said. “It was the landing that became the problem.”
Frequently Asked Questions
- How fast can a bison run?
Grandfather recounts terrifying bison attack at Yellowstone National Park - Are bison typically aggressive to park visitors?
While bison may appear calm while grazing, they are unpredictable. Yellowstone National Park records multiple attacks on humans every year.
Have you encountered wildlife in a national park? Share your experiences in the comments below or subscribe to our newsletter for more updates on park safety and visitor guidelines.
Keep reading