Bay Area Roots

Lore & Background

The earliest archaeological evidence of human settlements in the Bay Area dates back to 8,000–10,000 BC. The Ohlone and Miwok people have lived in the area for several hundreds if not thousands of years. The Spanish Empire claimed the area beginning in the early period of Spanish colonization, with the earliest Spanish exploration in 1769. The Mexican government controlled the area from 1821 until the 1848 Treaty of Guadalupe Hidalgo. The California gold rush brought rapid growth to San Francisco. A major earthquake and fire leveled much of San Francisco in 1906. During World War II, the Bay Area played a major role in America's war effort in the Asiatic-Pacific Theater. Since then, the Bay Area has experienced numerous political, cultural, and artistic movements.

Reader's Guide

The Bay Area is host to teams in each of the five largest North American men's professional sports leagues. It is also host to numerous higher education institutions, including research universities such as the University of California, Berkeley, and Stanford University. The region is known for its stands of coast redwoods, many protected in state and county parks. The climate is temperate and conducive to outdoor recreational activities such as hiking, running, and cycling.

Did You Know?

• The Bay Area's population is ethnically diverse: roughly three-fifths of residents are Hispanic/Latino, Asian, African/Black, or Pacific Islander.
• The most populous cities are Oakland, San Francisco, and San Jose, with San Jose being the largest at 969,655 in 2023.
• The Bay Area is crossed by six major earthquake faults, making it particularly exposed to large earthquakes.
• In 2018, the Bay Area was home to the third-highest concentration of Fortune 500 companies in the United States.