The Pahsimeroi Watershed (HUC 17060202) is located in central Idaho and covers an area of approximately 1,475 square miles. The area is characterized by rugged mountains, with elevations ranging from 4,000 to over 12,000 feet. The watershed is home to several streams and rivers that contribute to the Salmon River, including the Pahsimeroi River and its tributaries. Hydrologically, the Pahsimeroi Watershed is influenced by the snowpack, which typically accumulates from November to April and melts from May to June. Snowpack levels are closely monitored, as they have a significant impact on streamflow and water availability throughout the year. Surface water in the watershed is primarily used for agricultural purposes, with the Pahsimeroi Reservoir serving as a primary water source for irrigation. The reservoir is managed by the Bureau of Reclamation and has a capacity of approximately 18,000 acre-feet. In terms of climatic trends, the Pahsimeroi Watershed is subject to extreme temperatures, with hot summers and cold winters. The area has experienced a long-term warming trend, with average temperatures increasing by approximately 1.5°F over the past century. Overall, the Pahsimeroi Watershed is an important resource for both agriculture and recreation, and its hydrology and climate are closely monitored to ensure the sustainable use of its resources.