Missoula began in 1860 as Hellgate Village, a trading post located about 4 miles west of what is now downtown. In 1864, the construction of a mill powered by water diverted from Rattlesnake Creek drew residents of Hellgate to the new town, and the arrival of the Northern Pacific Railroad in 1883 assured Missoula's future. The establishment of the University of Montana led to growth on the south side of the Clark Fork River, and the timber industry drove the economy. Missoula has evolved into a trade, medical, educational, and governmental center of western Montana.