I don't mean to belittle bison with the title of this story by calling them 'dirty' but I use that word to express how close these bison were to the tourists taking the video. You can see the dust, grass, and ice on the bison fur.

More Than 100 Bison Cause Yellowstone Traffic Jam

Last weekend, Yellowstone National Park rangers had to close up the main roads a day earlier than planned due to a winter storm that rolled through and blanketed the park in snow. Now there is only one main entrance open to access the park. I'm going to assume that is where this video was taken. You can see that there is snow on the ground and trees as the bison herd wanders by the camera.

I wouldn't call the actions in the video a stampede but it is exciting, especially around one minute in when the massive bison appears. And speaking of actions, kudos to the tourists for not being tourons and thinking they could pet or ride a bison like we wrote about before.

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Three Main Roads To Yellowstone Closed For Winter Prep

While the bison seem to be great at traffic control and keeping drivers from speeding, mother nature does her part too. Each year in early November, three of the main roads into Yellowstone are closed for a few weeks until they can be opened for snowmobiles and snowcoaches.

LOOK: Stunning vintage photos capture the beauty of America's national parks

Today these parks are located throughout the country in 25 states and the U.S. Virgin Islands. The land encompassing them was either purchased or donated, though much of it had been inhabited by native people for thousands of years before the founding of the United States. These areas are protected and revered as educational resources about the natural world, and as spaces for exploration.

Keep scrolling for 50 vintage photos that show the beauty of America's national parks.

RANKED: Here are the most popular national parks

To determine the most popular national parks in the United States, Stacker compiled data from the National Park Service on the number of recreational visits each site had in 2020. Keep reading to discover the 50 most popular national parks in the United States, in reverse order from #50 to #1. And be sure to check with individuals parks before you visit to find out about ongoing, pandemic-related safety precautions at www.nps.gov/coronavirus.

LOOK: Here are the pets banned in each state

Because the regulation of exotic animals is left to states, some organizations, including The Humane Society of the United States, advocate for federal, standardized legislation that would ban owning large cats, bears, primates, and large poisonous snakes as pets.

Read on to see which pets are banned in your home state, as well as across the nation.

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