1803 - 1806 मायथायनि गेजेराव पेसिफिक लैथोमाखौ हानथिनाय समाव लिउइस आरो क्लार्का बे ओनसोलखौ बारलांदोंमोन ।
Lewis and Clark passed through the region during their 1803 1806 expedition to the Pacific Ocean .