1956 Map of Grassy Lake Reservoir

About this map

The Bechler River and its numerous cascades define this mid-century look at the convergence of three major protected wilderness areas. Surveyed in the mid-1950s, the map reveals a landscape where the Yellowstone National Park boundary meets the Targhee National Forest and Grand Teton National Park. The central focus is the high-altitude Grassy Lake Reservoir, a key piece of water infrastructure situated between the Pitchstone Plateau and the headwaters of several critical creek systems. Settlement is sparse, limited to points like Porter Ranch and isolated ranger stations or cabins. The intricate network of backcountry paths, such as the Bechler River Trail and Union Falls Trail, highlights the area's importance for early forest management and remote accessibility. High peaks including Hominy Peak and Forellen Peak provide the primary navigational landmarks for this high-country terrain.