The Rye Patch Reservoir is a reservoir on the Humboldt River in the U.S. state of Nevada. It is located about 22 miles (35 km) northeast of the town of Lovelock, and is managed by the Pershing County Water Conservation District. The reservoir stores water for the agricultural area surrounding Lovelock, which is at the far downstream reach of the Humboldt, near the Humboldt Sink. Since the Lovelock area receives a mere 5.76 inches (146 mm) of rain annually, agriculture requires irrigation, but the high variability of the Humboldt means that water storage is necessary for irrigation to be feasible.

The Humboldt River is an extensive river drainage system located in north-central Nevada. It extends in a general east-to-west direction from its headwaters in the Jarbidge, Independence, and Ruby Mountains in Elko County, to its terminus in the Humboldt Sink, approximately 225 direct miles away in northwest Churchill County. Most estimates put the Humboldt River at 300 to 330 miles long however, due to the extensive meandering nature of the river, its length may be more closely estimated at 380 miles (610 km). It is located within the Great Basin Watershed and is the third longest river in the watershed behind the Bear River at 355 miles (571 km) and the Sevier River at 325 miles (523 km). The Humboldt River Basin is the largest sub-basin of the Great Basin encompassing an area of 16,840 square miles (43,600 km2). It is the only major river system wholly contained within the state of Nevada.