Went to Yellowstone last week and hooked up on some browns. Nice peaceful part of the river next to the madison campground. Last couple of pictures are at the Green River at the flaming river gorge.
Yellowstone fishing is fantastic-hundreds of miles of rivers and streams with every type of water available; not to mention all the wildlife, geologic features and gorgeous scenery. My favorite place to fish for trout, grayling, whitefish. If you ever get the chance...do it, you will not be disappointed.