How Fast Can a Bear Run? Bear Speed Facts and Myths

Bear speeds compared

The 48 km/h (30 mph) figure for brown bears comes from measured runs in Yellowstone National Park. Many books and websites quote 56 km/h (35 mph), but that higher figure is anecdotal. Either way, a charging bear covers about 13 m (43 ft) every second.

How can such a heavy animal run so fast?

Bears look slow and lumbering when they walk, because they are plantigrade: like humans, they walk on the soles of their feet with the heel touching the ground. When they need speed, they switch to a powerful gallop with long, bounding strides.

Brown bears have huge shoulder and back muscles, and their shoulder hump gives the front legs extra driving power. Black bears are lighter and more agile, and they are excellent climbers too. Bears accelerate very quickly, which is what makes a charge so startling. They are sprinters, however, not endurance runners, and usually stop after a short distance.

Can bears run uphill and downhill?

A popular myth says you should run downhill to escape a bear, because bears’ front legs are shorter and they will tumble over. This is not true. Bears run well uphill, downhill and across slopes. Mountain grizzlies regularly gallop down steep meadows chasing ground squirrels, and black bears move quickly through rough, hilly forest.

Another myth says climbing a tree is a safe escape. Black bears are among the best climbers of all bears, and even grizzlies, especially young ones, can climb or reach far up a tree. Climbing is not reliable protection from either species.

Why you should never run from a bear

Running away can trigger a chase response in bears, as in many predators, and a person cannot win that race. Wildlife agencies in North America and Europe give the same core advice: do not run. Stay calm, stay in a group, give the bear space and move away slowly while watching it.

Many charges are bluff charges, in which the bear runs toward a person and then stops or veers away. The best way to avoid such a situation is to make noise on trails, keep dogs on a leash and never approach a bear. Detailed guidance on what to do differs between species and countries, so follow the advice of the park or wildlife agency where you are. More on the real risks is in are bears dangerous?

Polar bear speed on ice and in water

Polar bears are the largest bears, and they hunt mainly by stalking or waiting at holes in the sea ice for seals to surface. When they do charge, they can reach about 40 km/h (25 mph) over short distances. Their thick fur and fat layer mean they overheat quickly when running, so long chases waste precious energy.

In water, polar bears swim at about 10 km/h (6 mph), paddling with their big front paws. Their real strength is endurance: radio-collared bears have swum for days and covered hundreds of kilometers without stopping.

Do bears really chase people?

Most bears that see or smell people simply leave, often before the people ever notice them. Charges usually happen when a bear is surprised at close range, is protecting cubs or food, or has learned to expect human food. Even then, a charging bear often stops short. Bears also chase animals they see as prey, which is why a running dog or a fleeing person can prompt a pursuit. Keeping calm and still in a group makes people look less like prey and more like something to avoid.

Black bear vs grizzly: who is faster?

On flat ground, grizzlies and American black bears are in the same speed range, about 40–48 km/h (25–30 mph). Black bears are lighter and nimbler in thick forest and much better climbers, while grizzlies have more raw power in the open country they prefer. Neither can keep up top speed for long.

How bears compare with other fast mammals

Bears are fast for their size but far from the fastest animals. A cheetah can sprint at about 100–120 km/h (60–75 mph), pronghorn about 88 km/h (55 mph), and many deer, wolves and horses are faster than bears over longer distances. Still, an animal weighing several hundred kilograms that can briefly reach 48 km/h (30 mph) is still impressive. See the full ranking in fastest animals.