1957 Map of Yesmowit Canyon

About this map

The Ahtanum Indian Reservation Boundary defines the northern landscape of this quadrangle, separating the high ridges from the drainages that flow toward the Yakima Valley. The terrain is marked by a series of prominent east-west ridges, including Ahtanum Ridge, Sedge Ridge, and Rattlesnake Ridge, which create deep, isolating canyons. A complex network of seasonal and perennial streams like Simcoe Creek and Whitefoot Creek carve through the land, illustrating the vital role of water in this semi-arid environment. Named landmarks such as Diamond Dick and the Soda Springs provide localized points of interest for those studying the early ranching and survey history of the region. The map reveals a remote landscape dominated by topography and water rights, where the transition between the reservation and public lands is dictated by the rugged crest of Ahtanum Ridge.