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How common are bears in Yellowstone?

Author

Emily Sparks

Published Jan 17, 2026

The estimated Greater Yellowstone Ecosystem grizzly bear population increased from 136 in 1975 to a peak of 757 (estimated) in 2014. The 2019 population estimate is 728 bears. The bears have gradually expanded their occupied habitat by more than 50%.

How common are bear attacks in Yellowstone?

There is an average of one bear attack per year in Yellowstone.

How often are bears seen at Yellowstone?

Although bears are less frequently observed along roadsides and within developed areas today than in the past, many people still see bears each year. From 1980-2011 over 40,000 bear sightings have been reported to park managers.

What time of year are bears most active in Yellowstone?

The best time to see bears in Yellowstone is during spring as they emerge from hibernation, or autumn as they fatten up for winter.

Where are most bears in Yellowstone?

Grizzly bears are most commonly observed in Lamar Valley, Swan Lake Flats, Gardiners Hole, Dunraven Pass, Hayden Valley, and in the wet meadows along the East Entrance Road from Fishing Bridge to the East Entrance of the park.

28 related questions found

Should I be worried about bears in Yellowstone?

Both black and grizzly bears are frequently encountered in and around Yellowstone Park, and both species are unpredictable. Since it can be difficult to tell the two species apart, hikers are best advised to be wary of all bears.

Are grizzly bears in Yellowstone?

The grizzly population beat all odds after teetering on the brink of extinction. In Yellowstone area, it grew from 136 bears in 1975 to around 700 in 2019.

What to do if you see a black bear?

Alter your route or back away slowly, preferably in the direction you came. Walk, do not run, and keep your eye on the bear so you can see how it reacts. In most cases, the bear will flee. If the bear walks toward you, act boldly, yelling and throwing something at it.

Are grizzly bears aggressive?

Are Grizzly Bears Aggressive? While grizzly bears are generally peaceful animals who rarely attack people, they can be quite aggressive. Grizzly bears usually choose to avoid humans, however, they can quickly turn into aggressive and violent if provoked.

What time of day are grizzly bears most active?

Bears are most active at dusk and dawn, usually around water.

Will I see bison in Yellowstone?

Bison (Buffalo)

Bison, sometimes called buffalo, are everywhere in Yellowstone including the roads! If you encounter a bison on foot, stay a safe distance of 25 yards.

How many wolves are in Yellowstone?

An estimated 528 wolves resided in the Greater Yellowstone Ecosystem as of 2015. As of December 2021, there are at least 95 wolves in the park. Eight packs were noted. This count marks a decrease of 23% from 2020 but is close to the previous decade's average end of year count (2010-2019 average = 94.5).

How fast can a grizzly bear run?

Grizzly bears are not to be messed with

They can run as fast as 35 miles per hour—faster than the top speed of an Olympic sprinter—and stand as tall as 8 feet when on their hind legs.

How do you scare a bear away?

To scare the bear away, make loud noises by yelling, banging pots and pans or using an airhorn. Make yourself look as big as possible by waving your arms. If you are with someone else, stand close together with your arms raised above your head.

Has Old Faithful ever killed anyone?

In 2016, a man left the boardwalk and died after slipping into a hot spring in Norris Geyser Basin. Yellowstone National Park officials say one person died and two received severe burns from falling into a hot spring in the Lower Geyser Basin in August 2000.

What to do if u see a bear?

Remain still; stand your ground but slowly wave your arms. Help the bear recognize you as a human. It may come closer or stand on its hind legs to get a better look or smell. A standing bear is usually curious, not threatening.

What bear is the meanest?

Grizzly Bears

Grizzly bears are by far one of the most aggressive and dangerous species of bear that you can encounter. They usually live in the northern and western regions of the US, as well as in Canada and Alaska.

Can you befriend a bear?

No, bears are not friendly. One thing all bears have in common is that they're solitary creatures and aren't sociable, except for when mating or when mothers are raising their cubs. Experts studying bears think their intelligence surpasses that of dogs.

Can bears bond with humans?

Bears are normally shy, retiring animals that have very little desire to interact with humans. Unless they are forced to be around humans to be near a food source, they usually choose to avoid us.

How aggressive are black bears?

In fact, they are often attracted to people's food sources or get used to the presence of humans. However, black bears are typically not aggressive and fear the "repercussions of attacking someone," Garshelis said. "They just don't want to attack people," Garsheilis said. "They're kind of timid animals."

What animals are bears afraid of?

“Bears are naturally afraid of canids,” Hunt says. “Why? Because packs of coyotes can steal cubs.” The most common breed of bear dog is the Karelian bear dog, a black-and-white working dog that hails from the region between Finland and Russia called Karelia.

Which bear attacks humans the most?

The number of black bear attacks on humans is higher than those of brown bears, though this is largely because black bears outnumber brown bears rather than being more aggressive. Compared to brown bear attacks, violent encounters with black bears rarely lead to serious injury and death.

How many mountain lions are in Yellowstone?

The current population of lions in Yellowstone is estimated to be 18-24 animals and is thought to be increasing. Mountain lions are rather secretive, consequently, most visitors are unaware of their existence in Yellowstone. Lions probably live throughout the park in summer.

How many moose are in Yellowstone?

Population modelling based on fecal DNA determined that there are between 149 and 168 moose on the northern range inside Yellowstone and that the annual populationgrowth rate is 4%, (considered moderate growth).

How many black bears are in Yellowstone?

There are an estimated 500-600 black bears inhabiting Yellowstone National Park. Black bears are not all black; their coats can be cinnamon, blonde, brown or black. Brown -colored black bears are sometimes mistaken for grizzlies.