Key Points
65-year-old grandfather tossed 8 feet by bull bison at Bridge Bay Campground on July 10.
Passing pickup truck spooked already agitated 2,000-pound animal during rutting season.
Victim suffered multiple broken bones but remained conscious and is recovering after surgery.
Bison have injured more people in Yellowstone than any other animal.
A 65-year-old man named Carl Isom-McDaniel was hospitalized after a bull bison launched him 8 feet into the air at Bridge Bay Campground on Friday, July 10. The grandfather was walking with his grandson, keeping what witnesses say was a safe distance, when a passing pickup truck spooked the already agitated 2,000-pound animal into charging. He suffered multiple broken bones but remained conscious throughout the attack and is now recovering from surgery.
How the attack unfolded
Carl Isom-McDaniel and his grandson were photographing the bison from more than 100 yards away when a white pickup truck driving past on a park road triggered the charge. Photographer Mike MacLeod, who was filming the visibly agitated animal, captured the moment the bison hooked Isom-McDaniel with its horn and flipped him into the air. MacLeod said the bison was “pumping his legs and pumping his head and exhibiting very aggressive behavior.” The grandson escaped untouched. Isom-McDaniel never lost consciousness despite the impact and was transported to a nearby hospital by park emergency personnel.
Rutting season raises the stakes
The attack occurred during July, when bull bison enter rutting season and surge with aggression as males compete for mating opportunities. During this period, park officials recommend visitors stay 2 to 3 times farther away than the standard 25-yard minimum distance. Bison spook easily during certain times of year, and a passing engine, glint of chrome, or slamming door can trigger an attack. The bison had already charged a group of teenagers taking photos before targeting Isom-McDaniel and his grandson.
Why this attack was different
Unlike most Yellowstone wildlife incidents, neither Isom-McDaniel nor his grandson provoked the animal or ignored ranger warnings. According to park officials, bison have injured more people in Yellowstone than any other animal and are unpredictable, can run three times faster than humans, and will defend their space when threatened. MacLeod told Fox News he believed the grandfather “saved his grandson” by taking the brunt of the attack. Isom-McDaniel asked about his grandson’s safety even while in severe pain.
Park safety rules and recovery
Yellowstone requires all visitors to maintain at least 25 yards from bison at all times. Isom-McDaniel suffered multiple broken bones and underwent surgery. According to his family, the operation was successful and he is expected to recover. MacLeod, a veteran photographer, rushed to assist after the attack, helping other campers haze the bison away from the injured man.
Final Thoughts
The attack underscores how unpredictable wildlife can be even when visitors follow basic safety rules. During rutting season, bison become far more dangerous, and external triggers like passing vehicles can spark sudden charges with little warning.
FAQs
A passing pickup truck spooked the already agitated bull, causing it to charge. Bison spook easily during rutting season from engine noise, chrome glints, or slamming doors.
He was more than 100 yards away, well beyond the standard 25-yard minimum. During rutting season, officials recommend 2 to 3 times that distance.
He suffered multiple broken bones, primarily to his leg where he landed. He underwent surgery and is expected to recover.
Yes, the Washington Post reported this was the second bison attack at the park in two weeks, though details on the first incident were not provided in available sources.
Disclaimer:
The content shared by Meyka AI PTY LTD is solely for research and informational purposes. Meyka is not a financial advisory service, and the information provided should not be considered investment or trading advice.
About Author

Danny Kontos
Co FounderDanny Kontos has been a stock investor since 2007 and co-founded Meyka in 2023. He keeps a small, focused portfolio and only moves when the numbers are hard to argue with. He has waited years on a single position before. Before Meyka, he ran a web hosting company and a mortgage lending platform, so he knows what a well-run business actually looks like under the hood. This article did not come from a news cycle. It came from someone who has been watching this space for a long time.
What brings you to Meyka?
Pick what interests you most and we will get you started.
I'm here to read news
Find more articles like this one
I'm here to research stocks
Ask Meyka Analyst about any stock
I'm here to track my Portfolio
Get daily updates and alerts (coming March 2026)