The closest we get to mountain lions is rumors We do have a lot of bobcats---and based on the noise they make I can only imagine their big cousins!
I recently saw on one of the "good" channels a video of a mountain lion with two cubs. A brown bear came along, spied the cubs and decided they would make a nice snack-----mamma tore that full grown bear a new one---eventually he decided it wasn't such a good idea