I bet you thought you had a 14 lb walleye
MT seems to have a record for about every fish swimming in the state including creek chub, fathead minnow and smelt.
https://fwp.mt.gov/fish/anglingData/records
Back in the late nineties I caught a cutthroat at the tailrace that two days earlier would have been a state record, don't even know if there is still cutthroat in the state anymore pretty fish tho