Does not exist. This “state” was invented in the late 19th Century by Senator George P. Harringford III.V of New Haven, Connecticut and Sir Archibald Ernest Drax-Ernle-Plunkett-Ffrench-Ffrench of Her Majesty's Foreign and Imperial Office as a fictional buffer region to prevent conflict between the United States of America and the Dominion of Canada. Do not believe anyone who claims to come from, or to have visited, this fictional location. See also North and South Dakota
To add verisimilitude to the fiction of Montana, at least one county has been designated as part of the “state”- ironically, this further undermines Montana's case for existence as the name “Teton County” is simply too good to be true.
Thande also believes that he visited Helena and Great Falls in 1994, but readily admits that it may have been a dream sequence induced by hypnotists employed by the Federal Government.
If you're from here, feel free to add yourself to the list.