Once a valley of elk and orchards, Santa Clara is now a tech titan

Nature · Published 3 October 2026 Swipe more like this →

In short: Santa Clara County, the heart of Silicon Valley, has undergone a radical transformation. Once celebrated for its natural beauty and vast orchards, the region shifted rapidly during the 20th century to become a global hub for high technology, now hosting thousands of companies and holding the nation's highest median household income.

The landscape of Santa Clara County has shifted dramatically since its formation in 1850. Historically, the valley was a rich habitat for wildlife, including tule elk and pronghorn, which were observed in large numbers by early Spanish expeditions. By the early 20th century, the area was famously promoted as the Valley of the Heart's Delight, defined by its extensive orchards and natural beauty. However, the rise of the technology sector, beginning with companies like Hewlett-Packard in 1939 and accelerating through the 1980s and 1990s, led to the near-elimination of agriculture in the northern part of the county.

Today, the county is the epicenter of Silicon Valley, housing approximately 6,500 high-technology firms, including giants like Apple, Google, and Nvidia. This economic success has come with environmental costs. As of 2019, Santa Clara County holds the highest number of active Superfund sites in the United States, with 23 locations requiring long-term cleanup of hazardous materials, most of which are linked to the tech industry. Water security has also become a pressing concern, exacerbated by recent droughts and the drainage of the local Anderson reservoir for seismic repairs.

Conservation efforts are now working to restore some of the region's lost ecological heritage. The Nature Conservancy's Mount Hamilton Project aims to protect 500,000 acres of land, and successful efforts have been made to reintroduce tule elk to the Diablo Range. Since the initial translocations between 1978 and 1981, the elk population has grown to an estimated 400 animals. Conversely, attempts to reintroduce pronghorn have struggled, with recent records showing no sightings of the species in the county. These efforts highlight the ongoing tension between the region's dense urban development and its natural, historical roots.

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