1969 Map of Big Sandy Opening

About this map

Big Sandy River and the East Fork River carve through the high country of Sublette County in this late 1960s survey. The landscape is defined by the high-altitude transition from the Bridger National Forest into the Bridger Wilderness, marked by the Wilderness Boundary Line. The presence of the Big Sandy Driveway and the Big Sandy Campground indicates a region utilized for both seasonal livestock movement and recreation. Historical travel through these glaciated basins is documented by a network of paths including the Boundary Trail and Wheeler Ranch Trail. Scattered across the granite terrain are numerous alpine water bodies such as Poston Lake, Twin Lakes, and Mirror Lake, while expansive openings like Lamreaux Meadows and Iron Creek Meadows provide breaks in the timbered slopes beneath Laturio Mountain.