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Coat of arms of the Idaho Territory, an organized incorporated territory of the United States that existed from 1863 to 1890.
Idaho Territory originally covered all of the present-day states of Idaho and Montana, and almost all of the present-day state of Wyoming, omitting only a corner in the state's extreme southwest portion. It was wholly spanned east-to-west by the bustling Oregon Trail and partly by the other emigrant trails, the California Trail and Mormon Trail which since hitting stride in 1847, had been conveying settler wagon trains to the west, and incidentally, across the continental divide into the Snake River Basin, a key gateway into the Idaho and Oregon Country interiors. After several reductions, the final extent of the territory was admitted to the Union as Idaho.Credit: Henry Mitchell; restored by Godot13