1986 Map of Madison Junction

About this map

The convergence of the Gibbon River and Firehole River forms the Madison River at the historic Madison Junction, a central hub for early park travel. This 1980s-era survey details the complex thermal landscape of Yellowstone National Park, featuring the Gibbon Geyser Basin, Monument Geyser Basin, and numerous specific thermal features like Evening Primrose Spring and Sylvan Springs. The topography is dominated by Purple Mountain and National Park Mountain, which overlook the developed recreational facilities including a Campground, Amphitheater, and Picnic Area. The map also traces the Trans Line through the dense terrain and captures the descent of the river at Gibbon Falls, providing a precise record of the geological and administrative landscape along the Park and Teton County boundary before modern infrastructure expansions.