

Pioneers of California will include those who emigrated to California prior to the completion of the Transcontinental Railroad in 1869. Although California was admitted to the Union in 1850, travel between California and the rest of the continental U.S. remained time consuming and dangerous. Once the Transcontinental Railroad was completed, hundreds of thousands of U.S. citizens came west, marking the end of the pioneer period.
Please add profiles of those who were born or lived in California prior to 1870. NOTE: All pioneer profiles included in this project will be editable by the other Pioneers of California collaborators
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What is now California was first settled by various Native American tribes before being explored by a number of European expeditions throughout the 16th and 17th centuries. It was then claimed by the Spanish Empire as part of Alta California in the larger territory of New Spain. After the Portola expedition of 1769-70, Spanish missionaries created the California mission system, eventually establishing twenty-one missions on or near the coast of Alta (Upper) California, ranging from San Francisco to San Diego. During the same period, Spanish military forces built several forts (presidios) and three small towns (pueblos). Two of the pueblos grew into the cities of Los Angeles and San Jose.
Beginning in the 1820s, trappers and settlers from the U.S. and Canada began to arrive in Northern California. These new arrivals used the Siskiyou Trail, California Trail, Oregon Trail and Old Spanish Trail to cross the rugged mountains and harsh deserts surrounding California. In this period, Imperial Russia explored the California coast and established a trading post at Fort Ross. In 1821 the Mexican War of Independence gave Mexico (including California) independence from Spain; for the next 25 years, Alta California remained a remote northern province of the nation of Mexico.
Cattle ranches, or ranchos, emerged as the dominant institutions of Mexican California. The chain of missions became the property of the Mexican government and were secularized by 1834. The ranchos developed under ownership by Californios (Spanish-speaking Californians) who had received land grants, and traded cowhides and tallow with Boston merchants. It was ceded to the United States in 1848 after the Mexican-American War. The California Gold Rush began in 1848 with the discovery of gold at Sutter's Mill, leading to dramatic social and demographic change, with large-scale immigration from the U.S. and abroad and an accompanying economic boom. California was admitted to the Union as the 31st state on 9 September 1850.