William B. Ide wrote the proclamation that established the short-lived California Bear Republic in 1846. It lasted 22 days. Ide recognized the opportunities available to him in the West and as a surveyor, miner, treasurer, district attorney, deputy clerk, and judge, provided support and leadership to this northern part of California. While the park memorializes Ide's role in early California history, recent research has shown he never owned the property.

Like William B. Ide, pioneer settlers at Adobe Ranch arrived in California envisioning opportunities. Facing hardships and challenges, they took advantage of the ranch's location on the river to transform the site. Contrary to the quiet, rural impression the park leaves today, the ranch's location near the California-Oregon Road and adjacent to the Sacramento River (important communication and transportation arteries) probably kept its residents well connected. During the Gold Rush and afterwards, a succession of pack-m