2017 Map of Alameda Flat

About this map

The Columbia River defines the northwestern boundary of this high plateau region, where the Okanogan Co and Douglas Co line crosses the water near Mah-kin Rapids. The landscape is characterized by prominent benchlands and deep incisions, notably Alameda Flat and the adjacent Saddle Horse Flat. These elevated plains are dissected by numerous drainages, including Strahl Canyon, Buck Canyon, and Twin Springs Canyon, which drop toward the river valley. To the south, the terrain shifts toward more internal drainage patterns, marked by seasonal or semi-permanent water bodies such as Rattlesnake Lake and Wilson Lake, the latter situated near the rising profile of Wilson Butte. A network of rural section-line roads, such as Alameda Flats Rd and Rex Rd, provides access to these remote reaches, reflecting the large-scale agricultural and ranching survey patterns of Eastern Washington.