2014 Map of Lower Seymour Lake

About this map

Lower Seymour Lake sits at the heart of this high-elevation mountain terrain where the boundaries of Deerlodge National Forest and Beaverhead National Forest converge. The landscape is defined by its complex drainage network, where the headwaters of the Big Hole River collect runoff from numerous mountain streams including Seymour Creek, Sullivan Creek, and the various forks of La Marche Creek. In the north, Bear Trap Gulch carves into the slopes above the lake. This 2014 survey documents a wilderness primarily managed for conservation and recreation, showing the established US Forest Service road system including Seymour Creek Road and Fishtrap Road. The map also illustrates the administrative transition at the Deer Lodge and Beaverhead County line, reflecting the modern management of these vast public lands.