Lassen County lies in far northeastern California, bordering Nevada. The county seat is Susanville, the main population and service center. Formed in 1864, Lassen grew from pioneer ranching and lumber industries and remains known for wide-open spaces, mountain forests, and high-desert valleys. Its landscape ranges from pine-covered uplands in the west to arid plateaus toward the east. Population is sparse — under 35 000 residents — and daily life feels distinctly rural. Susanville hosts schools, small hospitals, and a modest downtown with older Craftsman and ranch-style homes. Outside town, properties are large lots or ranch acreage, with log cabins, mobile homes, and off-grid dwellings common. The average existing-home price is roughly US $325 000 – 400 000; newer builds cost US $225 – 300 per sq ft, depending on utilities and access. Because much land is publicly owned, development concentrates near Susanville and Westwood. The county sits about 1½ hours from Reno (NV), which serves as the nearest big-city job and retail hub. Overall character: rural-mountain, low cost, strong community identity.