1980 Map of Poison Meadows

About this map

Commissary Ridge dominates this high-country landscape within the Bridger National Forest, serving as a significant geographical spine where multiple major drainage systems diverge. The map documents the critical intersection of the Lander Cutoff and the Emigrant Trail, historic corridors that guided westward travelers through the Wyoming wilderness. The Tri Basin Divide represents a rare hydrological point where water flows toward three different major basins, a feature of immense interest to early surveyors and scouts. Along the southern reaches, La Barge Creek meanders through La Barge Meadows near the La Barge Guard Sta, while the northern portion is defined by the headwaters of the Greys River and Clear Creek. The network of names like Wagner Pass and the Lookout Pack Trail illustrates the era's reliance on established mountain passes and pack routes for traversing this complex terrain.