Flagstaff, Arizona is the largest city in Northern Arizona. It's located at the intersection of Interstate 17 and Interstate 40. The city is also the regional center and county seat for Coconino County, the second largest county in the 48 contiguous states. Flagstaff became a town in 1894 and incorporated as a city in 1928. Flagstaff currently covers just over 64 square miles at the base of the San Francisco Peaks. This mountain city is surrounded by one of the largest pine forests on earth. A very tall pine tree was made into a flagpole in 1876 to celebrate our nation's centennial brought about the name Flagstaff. At 7,000 feet, Flagstaff is also one of the highest elevation cities in the United States. The city is a year-round Mecca for visitors and many Arizonans maintain second homes here.