2021 Map of Big Sandy Reservoir

About this map

Big Sandy Reservoir dominates the southern landscape of this high-altitude Wyoming terrain, situated at the boundary of Sublette and Sweetwater Counties. The reservoir, formed along the Big Sandy River, serves as a critical point of water management and geography in this arid region. This 2021 survey shows the basin's complex shoreline and local access via Co RD 28, which skirts the southern edge of the water. The map detail highlights the river's path as it flows south from the upper elevations into the reservoir, revealing the natural hydrology that dictates human activity and land use in this part of the state.