
Sierra Ordnance Depot dominates the valley floor in this 1954 survey, reflecting the mid-century military presence in Lassen County. The surrounding landscape is a complex mix of high-desert logistics and rugged mountain terrain, where the Military Reservation sits adjacent to the emerging community of Herlong. To the south, the Bird Hills and Turtle Mtn rise sharply above Long Valley, which serves as a natural corridor for the Western Pacific and Southern Pacific railroads.
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