The Pecos Headwaters Watershed (HUC 13060001) covers a land area of approximately 3,380 square miles in the southern Rocky Mountains of New Mexico. The watershed is characterized by a high-altitude alpine environment with snowpack accumulation during the winter months, which provides the primary source of water for the Pecos River. The hydrology of the watershed is influenced by the snowpack, which typically accumulates from November through April and melts during the spring and summer months. This meltwater feeds into the Pecos River, which flows through the watershed and eventually into the Rio Grande. Surface water in the watershed includes numerous streams, creeks, and springs that provide important habitat for fish and wildlife. There are also several reservoirs in the watershed, including the Nichols Reservoir and the Cowles Ponds, which provide recreational opportunities for fishing and boating. The climate of the Pecos Headwaters Watershed is characterized by cold winters with heavy snowfall and warm summers with frequent thunderstorms. Climate trends indicate increasing temperatures and decreasing snowpack accumulation in recent years, which could have significant impacts on the hydrology and ecology of the watershed.