1986 Map of Mount Jackson

About this map

Yellowstone National Park terrain dominates this mid-1980s provisional survey, which illustrates the dramatic topography where the Madison River carves through the landscape. The river passes through the steep walls of Madison Canyon, flanked by high summits including Mount Jackson and Mount Haynes. To the west, the canyon opens into the broader Madison Valley, showing the transition from high-elevation peaks to lower basins. Significant natural features such as Purple Mountain and the Three Brothers Mountains are detailed alongside minor water bodies like Harlequin Lake and Duck Creek. This edition captures the wilderness character of northwestern Wyoming prior to the major wildfires of the late 1980s, providing a clear record of the established drainage patterns of Maple Creek and Cougar Creek and the early backcountry access via the noted Pack Trail.