1983 Map of Poison Lake

About this map

Lassen State Game Refuge dominates this high-altitude landscape in the early 1980s, centered on the shallow waters of Poison Lake. The area is a mosaic of volcanic features and forestry management, characterized by numerous Cinder Pits and the expansive Blacks Mountain Experimental Forest. Evidence of earlier industrial transport is visible through the Old Railroad Grade winding through the northern sections near Longs Cabin. The map reveals a land utilized for both conservation and resource extraction, with multiple Borrow Pits and water management features like Half Cabin Reservoir and Patterson Well scattered across the terrain. Routes like the Pittville Road and various 4wd tracks provide access to remote landmarks such as Robbers Spring and the open expanses of Patterson Flat.