Those fish were not trout but chinook salmon. They are a listed species and are endangered. They come up from the ocean about 900 miles to reach their spawning grounds up here in Idaho. Touching them and getting caught doing so brings a heafty fine and will get you a date with a judge. Also walking in the stream is very, very, very bad. those fish were spawning and you were walking on their spawning bed and most likely smashing their eggs and causing an already endagered species to be set back in their numbers.