I like to hunt them when the snow is deep and they are moving down from the high country this is when I glass the sunny side of the riges when they are basking in the sun.

Also in they early to mid morrning,look for them under ridges were they can see a long ways and watch to see who is coming.Also don't forget the rut,these big boys get stupid when the does come in heat and you can get some easy stalks on them when they are rutting.