A 2,000-pound bull bison does not care if you follow the rules. On Friday evening at the Bridge Bay Campground in Yellowstone National Park, a grandfather and his grandson learned this the hard way. They did everything right. They stayed far back. They kept an estimated 100 yards of distance, completely honoring the National Park Service safety guidelines. Yet, the animal still charged, hooking the grandfather on his hip and launching him eight feet into the air.
Most wildlife incidents in national parks happen because people act foolishly. We have all seen the viral videos of tourists trying to pet wildlife or getting close for a selfie. This was different. This specific Yellowstone bison attack proves that even when you respect the park guidelines, wild animals remain entirely unpredictable.
The Reality of the Bridge Bay Campground Incident
The attack happened during a casual evening walk. Nature photographer Mike MacLeod was on the scene, watching the bull bison wander into the camping loop. The animal was already highly agitated. Before targeting the grandfather, the bull had already charged a group of children who scattered safely, and it even rammed a white pickup truck that quickly sped off.
The grandfather and grandson saw the commotion and tried to get out of the way. They retreated behind a cluster of trees to let the animal pass. The bison focused on their hiding spot anyway. It tore through the saplings, chasing the pair. The grandson managed to outrun the animal, but the bull caught the grandfather.
The impact was brutal. The bison hooked the man with its left horn, flipping him completely over. Witnesses reported the man flew higher than the six-foot bull before landing heavily on his side.
MacLeod and several bystanders immediately stopped filming and rushed toward the animal, shouting loudly to scare it away. The distraction worked, and the bull retreated. While the victim did not show massive external bleeding, his grandson later shared that he suffered severe internal and hip injuries. He remains in serious condition.
Why Mid Summer Makes Bison Incredibly Dangerous
This is the second major encounter in the park this summer, following an incident in late June where a 12-year-old was injured near Mud Volcano. The timing is not a coincidence.
July marks the peak of the bison rutting season. From June through September, male bison compete fiercely for mates. Their testosterone levels skyrocket. They wallow in the dust, bellow constantly, and become hyper-aggressive. A bull during the rut views everything as a threat. A passing truck, a rustling tree, or a person standing far away can trigger an immediate charge.
Bison can run 35 miles per hour. That is three times faster than the average human sprint. You cannot outrun them. If a bull decides to charge, your options shrink instantly.
How to Handle an Unpredictable Wildlife Encounter
You cannot control a wild animal's behavior, but you can change how you react when a situation turns south.
Look for the Early Warning Signs
Bison rarely charge completely out of nowhere. They give physical cues that they are agitated. Watch for these behaviors:
- Pawing the ground with their hooves.
- Bellowing or snorting loudly.
- Raising their tail straight up in the air.
- Shaking their head aggressively side to side.
If you notice any of these signs, you are already too close. Do not stand your ground to take a photo. Drop the phone and move away immediately.
Change Your Definition of a Safe Distance
The National Park Service mandates a minimum distance of 25 yards from bison and elk. During the summer mating season, that official number is simply not enough. Treat these animals with the same distance buffer you would give a grizzly bear or a wolf, which requires at least 100 yards. If you see a lone bull walking through a developed area or campground, do not wait for it to get close. Leave the area entirely.
Use Solid Barriers
Hiding behind a thin tree will not stop a charging bull. Bison routinely snap small trees when they are angry. If an animal moves toward you, put a large, solid object between yourself and the wildlife. A heavy picnic table, a large boulder, or a vehicle offers actual protection. If you are near a vehicle, get inside and lock the doors.
Next Steps for Your Park Visit
If you are planning a trip to Yellowstone this summer, adjust your expectations. Campgrounds and paved paths do not guarantee safety.
Check the daily wildlife activity reports at the visitor center before heading out on trails. Carry bear spray, as it can also be used as a last resort defense against charging large mammals. Keep your eyes up and your headphones out while walking through campgrounds. Wild animals hold the right of way, and during the summer rut, they will take it by force.
