I believe that would be nearly the entirety of Wyoming.
Pretty much, and those using earschplitten loudenboomer .300 H&H, .300 Win Mag and ,338 Lapua during elk season will be particularly grateful, not so much for their shot at an elk, but for the lessened damage incurred during sighting in at various ranges.
In my own case, a .22 rifle is likely to be my first purchase along these lines. In the Wyoming Grasslands of the Black Hills, the buzztail rattlesnakes come out for the field mice once the grasses get above ankle-high. A handgun is helpful, but having been nailed by Mr. no-shoulders once [left leg] I sort of like to work from a distance. If I get bit again in the same leg, I'll likely lose it.
Anyone who thinks that suppressors on handguns is a bad idea is invited to touch off a handgun while on horseback without one.
Here's hoping you see the rattlers before they see you from here on out!