Boise (also Boise City), is the capital, and one of two metropolitan areas, of Idaho, a state of the United States of America. As of the 2000 census, it has a population of 185,787. It is the county seat of Ada County. Boise's elevation is 2,842 feet.
... stations, all of which were at the far end of the Metropolitan Line, and stretch the definition of "tube station" a little:
Waddesdon tube station[?]
Quainton Road tube ...