Lost Creek Reservoir Number 1 is a man-made reservoir located in Jacksboro, Texas. It was created in 1962 by the Brazos River Authority for the purposes of flood control, water supply, and recreation. The reservoir is fed by Lost Creek and several smaller tributaries, and its hydrology is heavily influenced by rainfall and surface flow. Agriculture and recreational activities, such as fishing and boating, are common uses of the reservoir. The surrounding area is also home to several snowpack providers, which contribute to the reservoir's water supply. Despite its importance, Lost Creek Reservoir Number 1 has experienced a decline in water levels due to drought conditions and overuse, prompting conservation efforts and water management strategies.