According to  national  geo said "arciolagist just made a huge discovery idaho is a blade  made out of rock and it is 13,500 YEARS OLD. And that proves that native ameracan tribes like,the Nez perce and,shoshone tribes lived there THOUSANDS OF YEARS BEFORE IT WAS EVEN DISCOVERD!!!!!! Did you know the word idaho isn't even a word? In 1860 gold was discovered in idaho three years later in 1863 it became it's own teretory 27 years later on july 3rd 1890 idaho became the 43rd state of  the United States Of America. The first non native people in idaho were marywether  lewis and William clark and they were the leaders of the Lewis and Clark expadition.