The Californian golden trout is rare enough to make this list, but it’s beat out by the palomino, an incredibly rare form of rainbow trout that happen to have a golden color variant. Also called golden rainbow trout, palomino can be found in scattered locations across the States, but the Eastern seaboard holds the largest population. Mahoning Creek, Pennsylvania houses the largest of this fish, with some growing as heavy as 13 pounds. Catching a palomino trout is quite rare, so if you choose to head to Pennsylvania expecting instant results, you will be disappointed.