| Spruce Run | |
| Pushpin Map: | USA New Jersey Hunterdon County#USA New Jersey#USA |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New Jersey |
| Subdivision Type3: | County |
| Subdivision Name3: | Hunterdon |
| Source1: | Schooley's Mountain |
| Mouth: | South Branch Raritan River |
| River System: | Raritan River |
| Custom Label: | GNIS feature ID |
| Custom Data: | 880826 |
Spruce Run is a tributary of the Raritan River in Hunterdon County, New Jersey. It starts from the southwestern slope of Schooley's Mountain, northeast of Anthony in Lebanon Township, and flows southwest toward Glen Gardner.[1] It then flows south toward Clinton, where it joins the South Branch Raritan River. The Mulhockaway Creek is a tributary and flows from Jug Mountain. The southern slopes of the Musconetcong Mountain drain into the Spruce Run.[1]
In 1964, the Spruce Run Reservoir Dam was built by the New Jersey Water Supply Authority, forming the Spruce Run Reservoir.[2] The reservoir is the third largest in the state and is encompassed by the Spruce Run Recreation Area.[3] The source of the stream is protected, located in Crystal Springs Preserve, a county park.[4] In addition, several sections of the stream are protected for fishing, hiking and nature observation.[5]