The Hualapai Wash Watershed (HUC 15010007) covers an area of approximately 1,420 square miles in northwestern Arizona. The watershed is characterized by arid and semiarid conditions, with average annual precipitation ranging from 4 to 16 inches. Surface water is scarce and intermittent, with the Hualapai Wash being the largest perennial stream. Snowpack is also limited, with the highest elevations receiving the most snowfall. Reservoirs within the watershed are primarily used for domestic and agricultural purposes. Interesting climatic facts include the occurrence of monsoonal thunderstorms during the summer months and occasional winter storms that bring snow to the higher elevations. Recent trends show a decrease in precipitation and snowpack, which have implications for water availability in the region. Overall, the Hualapai Wash Watershed is a unique and challenging environment for hydrological management.