How fast can a bear run?

Brown bears - are extremely fast, capable of running in short bursts as high as of 40 mph (64 km/h).

Polar bears - have been clocked at a top speed of 35 mph (56 km/h), along a a road in Churchill, Canada.

Grizzly bears - can reach top speeds of up to 30 mph (48km/h), but they can't maintain that speed for very long.

American Black bears - can reach running speeds of up to 25 mph (40km/h).

Bears aren't necessarily built for speed, but are capable of running fast when necessary.