In the bars of Montana (which has some of the most colorful bars in the country), the signature drink is a ditch, known formally as a whiskey ditch. A Big Sky cognate of Texas bourbon and branch, it is a mix of whiskey and water— usually half-and-half—on ice; and in the classic cowboy bars, it is about as fancy a drink as you can get. Its etymological apocrypha is that during Prohibition, in order to make what little whiskey they had last longer, tipplers mixed it with water and hid their stash in a nearby ditch.