2015 Map of Ash Valley

About this map

Ash Valley defines this high-elevation landscape in Lassen County, where ranching and resource management intersect within the Modoc National Forest. The map documents a network of rural routes and water sources essential for livestock and forestry, including Richelieu Ranch Rd and several localized water features like Fleming Spring and Fulstone Spring. Notable relief is provided by Knox Mtn and Anderson Mtn, while the seasonal hydrology of the region is anchored by Holbrook Reservoir and Spooner Reservoir. These reservoirs and the vast Sagebrush Flat illustrate the land-use patterns of the northeastern California interior, where canyons like Holbrook Canyon and Spooner Trough Canyon dictate the movement of both water and travelers.