2020 Map of West of Paterson

About this map

Lake Umatilla dominates the southern portion of this landscape, where the North Channel Columbia River and South Channel Columbia River diverge around a series of islands at the Washington-Oregon state line. The terrain is defined by the high, arid elevations of Paterson Ridge and Canoe Ridge, which overlook the river valley. The map reveals an agricultural landscape shaped by large-scale irrigation and land management, most notably at the Sandpiper Farms Settling Pond and along S Sandpiper Rd. Drainage systems like Glade Cr and its eastern branch cut through the uplands, leading down toward the Columbia. The presence of named river features such as Big Blalock Island, Telegraph Island, and Whitcomb Island illustrates the complex geography of the river before and after the formation of the modern reservoir system.