1989 Map of McDonald Peak

About this map

The Madeline Plains stretch across the northern reaches of Lassen County, where high-desert ranching and water management define the landscape. This 1989 provisional map documents the vital infrastructure of the era, from the Mendiboure Reservoir and Van Loan Reservoir to the numerous springs that sustain the region, including Poulsen Spring and Big Springs. The topography is dominated by the volcanic forms of McDonald Peak and Three Peaks, providing a clear view of the transition from the flat plains to the more varied terrain of Threemile Canyon.