A Colorado jogger fought off a mountain lion in the foothills of Horsetooth Mountain on Monday, suffering severe bites before he killed the wild animal in self-defense.

The man, who was not identified, was jogging on a trail on the West Ridge of the Horsetooth Mountain Open Space, a mountain park about 66 miles northwest of Denver.

A juvenile mountain lion attacked him from behind, biting and clawing the man’s face, back, legs and arms, the Colorado Parks and Wildlife and the Larimer County Department of Natural Resources said in a joint release. It was not disclosed how the jogger killed the animal, and no one from the CPW or the Larimer DNR was available for comment.