2018 Map of Tonkin Summit

About this map

Tonkin Summit marks the geographical centerpiece of this high-altitude landscape in Eureka County, where the Simpson Park Mountains dominate the western terrain. This 2018 survey reveals a territory defined by complex hydrologic networks, featuring a series of critical water sources including Tonkin Spring, Black Spring, and Indian Spring that support the arid environment. The map details the drainage patterns through deeply incised features like Pat Canyon and Pete Hanson Canyon, which feed into the broader Denay Valley. Transportation is restricted to a few established routes such as 3 Bars Rd and Mcclusky Rd, indicating the sparse, utilitarian nature of the human presence here. The presence of numerous named springs, such as Lower Tonkin Creek Spring and Upper Tonkin Creek Spring, highlights the importance of reliable water points for livestock and land management in this portion of the Great Basin.