Our region is rich in history, from the Gold Rush era to frontier conflicts and the early days of settlement. Knowing Our Local History is a recurring series dedicated to uncovering the stories, events, and people that shaped Plumas, Lassen, Sierra, and Modoc Counties. Periodically, we’ll highlight significant moments in our past—some well-known, others nearly forgotten—to celebrate the legacy of our communities and the pioneers who built them.
Discovery of Gold in Sierra County – February 1850
In February 1850, rich gold deposits were discovered along the Yuba River in what is now Sierra County. This discovery led to a significant influx of prospectors and settlers during the California Gold Rush, rapidly transforming the area. Towns such as Downieville emerged as bustling mining centers, contributing to the economic development of the region.
The Sagebrush War (Boundary War) – February 15, 1863
On February 15, 1863, tensions over unclear boundaries between California and Nevada culminated in the Sagebrush War, also known as the Boundary War or Roop County War. The conflict arose when both Plumas County, California, and Roop County, Nevada, claimed jurisdiction over the Honey Lake Valley and the settlement of Susanville. Disputes between officials led to an armed standoff at Roop’s Fort in Susanville. After a brief exchange of gunfire resulting in minor injuries, a truce was negotiated. Subsequent surveys clarified the border, placing Susanville within California, leading to the establishment of Lassen County in 1864 to address local governance.
Formation of Lassen County – February 18, 1864
Following the boundary disputes highlighted by the Sagebrush War, the California Legislature officially created Lassen County on February 18, 1864. Named in honor of pioneer Peter Lassen, the county was established to provide organized governance for the residents of the Honey Lake Valley and surrounding areas. Susanville was designated as the county seat, solidifying its role as the administrative center of the region.
Establishment of Alturas as Modoc County Seat – February 17, 1874
On February 17, 1874, Alturas was designated as the county seat of Modoc County. Originally known as Dorris Bridge, the town was renamed Alturas, meaning “heights” in Spanish. Its selection as the county seat marked a pivotal moment in the administrative organization of Modoc County, facilitating governance and development in the northeastern corner of California.
These events underscore the rich and complex histories of Plumas, Lassen, Sierra, and Modoc Counties, reflecting their roles in California’s broader narrative during the 19th century.
