2020 Map of Blackstone Reservoir

About this map

Blackstone Reservoir sits at the center of this high-desert landscape in Owyhee County, serving as a vital water source in an arid region defined by seasonal drainages and vast open spaces. The map reveals a remote geography where human infrastructure is limited to the winding Blackstone Grasmere Rd, which provides the primary access through the Blackstone Desert. This area is characterized by its complex hydrology, with ephemeral watercourses such as Louse Cr, Nit Cr, and Sheep Cr cutting through the terrain. The presence of Juniper Draw suggests the localized vegetation patterns found within the draws and depressions of the basaltic plateau. This survey, compiled from data ranging from 2002 to 2020, captures the persistent character of this rangeland, where modern land management and traditional western geography intersect.