I was eleven years old when I first visited Montana in 1953. It was a cross country adventure from Chicago without expressways, and almost all two lane traffic. Somewhere in North Dakota and then exclusively in Montana, it was all ranch land, much of it still unfenced with cows frequently blocking the highway. We would pull up to them and wait, partly because we were not in a hurry, and partly because we weren't sure of the proper etiquette when meeting a herd of cows on the highway.
At one wait, a rancher came flying down the highway at 80 miles an hour in his pickup (Montana had no speed limits back then, except in towns) blowing his horn continuously, and the cows just casually moved off the road. OK, I guess this waiting for cows was unnecessary.
One of things I miss most about back then was that all the cows, at least close to 100% were White Faced Herefords. Those were rare in the Chicagoland area. We did have cows, but they were the dairy types. But White Faced Herefords just screamed, "Montana!" I guess they were well adapted to the brutal winters. I think I heard that.
Today, the Herefords are much rarer. Apparently better breeds, either more well adapted, or perhaps just more beefy are more the rule. I had friends that owned a ranch east of the Rockies in Montana. I don't recall a Hereford anywhere on their several square miles of land. They were all white and were breeds with unfamiliar names to a guy from the western mountains of the state where I ended up. Angus were becoming more popular too, along with others I could not name.