The Bears were the minor antagonists in Alpha and Omega.
The bears were first introduced when Humphrey accidentally made a bear cub cry. The first bear was the mother of the cub. She thought Humphrey was trying to hurt her cub on purpose. She started chasing Humphrey all the way to Kate. Kate thought she and Humphrey can take the mom bear down. Then two male bears appeared. Now the wolves are in trouble.
Humphrey tried to make the bears stop thinking about killing them by telling them a joke. All he got was a paw in the face. Kate tried to confuse the bears by showing her talent of being an Alpha, but it didn't work either. The bears cornered them on a fallen tree trunk stuck on a cliff. A blue colored bear tried to go on the tree trunk but he heard a snapping noise. Which means that it is likely to fall. The blue bear stepped back and started shaking the tree trunk. He shook it so much that he fell as well. He slid and tried to kill the wolves. Kate and Humphrey had an unfair advantage by using a bark sled.
The bear eventually caught up to them. They looked at him then the bear started to looked worried. Humphrey asked him why was he looking like that. The bear (Still having a worried face.) pointed at a train that was moving. They all screamed. Kate and Humphrey made it in the train. The bear of course, went flying to the other side of the train track. Kate and Humphrey lose the bears and gets in a train that is heading for Jasper National Park.