2023 Map of Swan Lake

About this map

Swanlake and Treasureton anchor this corner of the Idaho landscape, where the high ridges of the Portneuf Range meet the vital wetlands of the Marsh Valley. The topography is defined by significant elevations like Dry Hollow Mtn and Heart Mountain, which overlook a network of seasonal drainages including Coyote Hollow and Hutchins Canyon. The southern portion of the quadrangle is dominated by the Oxford Slough Waterfowl Production Area, a critical habitat adjacent to Oxford Slough. This modern survey illustrates the complex water management system of the region, specifically the Treasureton Canal and various creeks like Stockton Creek that feed into the low-lying basins. The interface between the steep mountain slopes and the marshy flats at Poverty Flats highlights the traditional agricultural and conservation boundaries that characterize this part of Bannock and Franklin counties.