1989 Map of Tunnison Mountain

About this map

Horse Lake Mountain and Tunnison Mountain dominate this corner of Lassen County, where the high desert terrain meets the water management systems of the late twentieth century. In the low-lying Willow Creek Valley, the landscape is defined by engineered hydrology, notably seen in the Road on Levee and the presence of several catchment basins. The map identifies Gerrish as a focal point for local settlement or operation in an area otherwise characterized by springs and canyons. Water resources are carefully documented through features like Hagata Reservoir, Streshley Reservoir, and Antmas Spring. Small-scale industrial activity is evidenced by a Borrow Pit located near Morton Reservoir, while the inclusion of multiple Rock wall notations suggests historic property boundaries or livestock enclosures common to the region's ranching heritage.