Sgt. Steve Jacobi said shortly after 8 p.m. PT the man was walking on the Cedar Valley Connector trail when he ran into the bear about a metre in front of him.
"Just as he turned around to run the bear actually grabbed a hold of his right leg and took him to the ground," said Jacobi.
"The bear was trying to get on top of him, but there was a fence nearby. The person managed to get hold of the fence and pull himself away enough that the next swipe that the bear took missed."
Man scrambled over the fence, but the bear followed close behind, scaling the fence as well.
But just as bear got on top of the fence some cars came by and scared it back into the greenbelt again.
Jacobi said given the bears very aggressive behavior, the man was very lucky to escape with only some light scrapes.
Jacobi says bears have been active in the 6th Avenue area lately and three conservation officers plan to set some traps and spend the night trying to track down the bear.
He said he expects the bear will be destroyed if it is caught because it was so aggressive.