Cybersecurity in Walnut Creek, CA

There are three bands of Bay Miwok Native Americans associated with early Walnut Creek, the stream for which the city is named: the Saclan, whose territory extended through the hills east of present-day Oakland, Rossmoor, Lafayette, Moraga and Walnut Creek; the Volvon (also spelled Bolbon, Wolwon or Zuicun) near Mt. Diablo; and the Tactan, located on the San Ramon Creek in Danville and Walnut Creek.

Today’s Walnut Creek is located within the earlier site of four Mexican land grants. One of these land grants – measuring 18,000 acres (73 km²) – belonged to Juana Sanchez de Pacheco, who eventually passed the land down to her two grandsons. Ygnacio Sibrian, one of the grandsons, created the first roofed home in the valley in about 1850. The grant was called Rancho Arroyo de Las Nueces y Bolbones, named after the principal waterway, Arroyo de las Nueces (Walnut Creek), as well as for the local group of indigenous Americans (Bolbones). The Arroyo de las Nueces was named for the evidence of the native species of walnut tree, the California Walnut.

With the coming of American settlers following the Mexican-American War, a small settlement called “The Corners” emerged, named because it was the place where roads from Pacheco and Lafayette met. The site of this first American settlement is found today at the intersection of Mt. Diablo Boulevard and North Main Street. The first town settler was William Slusher, who built a dwelling on the bank of Walnut Creek, which was called “Nuts Creek” by the Americans in 1849. In 1855, Milo Hough of Lafayette built the hotel named “Walnut Creek House” in the corners. A blacksmith shop and a store soon joined the hotel, and a year later, Hiram Penniman (who built Shadelands Ranch) laid out the town site and realigned the Main Street of today. Two decades later, the community changed its name from The Corners to Walnut Creek.