There's nothing quite like the thrill of fly fishing on the pristine waters of the Gallatin River near Big Sky Montana. The river is home to some of the largest trout in the country, making it a popular destination for anglers from all over the world. And with plenty of outfitters and guides available, even novice fishermen can enjoy successful trips. Trout Species and other fish found in the river are Rainbow, Brown, Cutthroat, Whitefish, and Brook, if you're lucky, you can even reel in a Arctic Grayling. The state's limit for Brown and Rainbow trout is five (daily) and only one can be over 18 inches. If you catch a Grayling and/or a Cutthroat trout you must release it immediately.