2017 Map of Vinson Wash

About this map

Vinson Wash and Poison Gulch define the drainage patterns of this arid landscape in Owyhee County, where the terrain transitions from the high-desert drainages to the artificial water systems of the Snake River valley. The presence of the Grand View Irrigation District Canal along the northeastern edge illustrates the critical role of water management in supporting the region's agricultural viability. While much of the area consists of open terrain like Twentymile Flat, the local road network—including Mud Flat Rd and the curiously named Missile Base Rd—provides evidence of both ranching access and Cold War-era infrastructure. Researchers can also trace seasonal watercourses such as Birch Cr, McKeeth Wash, and Jensen Wash, which carve distinct topographical features through the surrounding ridges and plateaus.