2011 Map of York Island

About this map

York Island sits prominently in the waters of Fort Peck Lake on this 2011 survey, a central landmark in this portion of Valley County. The geography is defined by the massive reservoir created by the Fort Peck Dam, which is visible in the northern section of the sheet. The complex shoreline is a series of deep inlets and jutting landforms, including Haxby Point to the south and Markles Point in the northwest. Named water features such as Perch Bay, Sturgeon Bay, and Catfish Bay indicate the recreational and ecological character of the reservoir's western reaches, while Bear Creek Bay indentures the eastern shore. This map documents the modern contours of the lake and its surrounding terrain, illustrating the significant impact of hydraulic engineering on the Montana landscape.