El Dorado County, California along with the population since the 1960 Winter Olympics, hosted at Squaw Valley Ski Resort in neighboring Placer County. The present-day site of El Dorado County was once home to the Maidu, Washoe, and Miwok Native American tribes, and is notable for being the site of the 1848 gold discovery that sparked the California Gold Rush. The County of El Dorado was one of California's original 27 counties created effective February 18, 1850 (the number has risen to 58 today). Its name is derived from the Spanish meaning "the gilded/golden". The final segments of the Pony Express mail route ran
Dorado, Puerto Rico plaza every year on June 13. During the early years of the 18th Century, there were already mentions of a "Sitio de Dorado" in some San Juan registers. Since the beginning of the Spanish colonial period and until 1831, Dorado existed as a barrio (or ward) of the town of Toa Baja. Over several years, the ward grew and established its own town center called the "new pueblo" to differentiate itself from Toa Baja, which became known as the "old pueblo." Over several years, the wards that currently make up Dorado grew and the people of the "new pueblo" wanted