1989 Map of Lake Marshall

About this map

The Flathead Indian Reservation boundary defines the high-altitude landscape of this 1989 survey, where the Mission Mountains Tribal Wilderness meets the protected reaches of the Flathead National Forest. This remote terrain is characterized by a network of glacial lakes and high-relief peaks, including Lindbergh Lake in the northwest and Lake Marshall at the center. The map documents the headwaters of several critical drainages, such as the Swan River and the West Fork Clearwater River, which flow from the steep slopes of the Mission Mountains. The absence of roads is notable, with the area instead being traversed by a series of high-country routes labeled simply as Pack Trail. These trails link remote water bodies like Lake Dinah and Beaver Lake to prominent landmarks like Henry Mount, illustrating the preservation of primitive wilderness and tribal lands in the late 20th century.