Which is the river seen in the Montana seal printed on the state flag? It is the Great falls of the Missouri River. You can add a 4 ft x 6 ft nylon flag to your cart along with a flag base, and optional cord & tassel. You can also choose from a variety of pole toppers like 7-inch metal gold eagle, gold spear (plastic), gold metal spear, Army metal spear, gold metal parade ball, or Texas Star Metal. You can opt between an oak and a telescoping flag pole.