Perhaps the earliest visitors to the Las Vegas area were nomadic Paleo-Indians, who traveled here 10,000 years ago, leaving behind petroglyphs. Anasazi and Paiute tribes followed at least 2,000 years ago.
A young Mexican scout named Rafael Rivera is credited as the first non-Native American to encounter the valley, in 1829. Trader Antonio Armijo led a 60-man party along the Spanish Trail to Los Angeles, California in 1829. The area was named Las Vegas, which is Spanish for "the meadows," as it featured abundant wild grasses, as well as desert spring waters for westward travelers. The year 1844 marked the arrival of John C. Fremont, whose writings helped lure pioneers to the area. Downtown Las Vegas' Fremont Street is named after him.
Eleven years later members of the LDS Church chose Las Vegas as the site to build a fort halfway between Salt Lake City and Los Angeles, where they would travel to gather supplies. The fort was abandoned several years afterward. The remainder of this Old Mormon Fort can still be seen at the intersection of Las Vegas Boulevard and Washington Avenue.
Las Vegas was founded as a city in 1905, when 110 acres (45 ha) of land adjacent to the Union Pacific Railroad tracks were auctioned in what would become the downtown area. In 1911, Las Vegas was incorporated as a city.