2017 Map of Big Rock Hill

About this map

Brimhall Nizhoni and Twin Lakes anchor this high-desert landscape in the late 2010s, where the topography transitions from the broad Tohatchi Flats to prominent elevations like Big Rock Hill. This area of the Fort Defiance Agency is marked by a complex network of seasonal drainage and water sources, including Figuredo Wash and Dye Brush Wash, which cut through the terrain toward Bass Lake. The presence of Coal Mine Hill and Coal Mine Spring suggest the importance of local resources, while multiple springs such as Sheep Spring and Tohasjed Spring indicate vital water points in an arid environment. A dense grid of service roads, including Navajo Svc Rte 37 and Indian Svc Rte 371, reflects the modern infrastructure connecting these residential and grazing lands across the varied relief of Grey Ridge Canyon and Window Rock Canyon.