| Warm Fork Spring River | |
| Name Other: | Tributary to Spring River |
| Pushpin Map: | Arkansas#USA |
| Pushpin Map Caption: | Location of Spring River mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Missouri Arkansas |
| Subdivision Type3: | County |
| Subdivision Name3: | Fulton (AR) Oregon (MO) |
| Subdivision Type4: | City |
| Subdivision Name4: | Thayer, MO |
| Length: | 19.21miles[1] |
| Discharge1 Location: | Spring River |
| Discharge1 Avg: | 317.46cuft/s at mouth with Spring River[2] |
| Source1: | confluence of Howell Creek and Elk Creek |
| Source1 Location: | about 3 miles northeast of Brandsville, Missouri |
| Source1 Coordinates: | 36.6766°N -91.6499°W[3] |
| Source1 Elevation: | 750feet |
| Mouth: | Spring River |
| Mouth Location: | Mammoth Spring, Arkansas |
| Mouth Coordinates: | 36.4945°N -91.386°W |
| Mouth Elevation: | 492feet |
| Progression: | Spring River → Black River → White River → Mississippi River → Gulf of Mexico |
| River System: | White River |
| Tributaries Left: | Elk Creek Anthony Branch Cox Creek |
| Tributaries Right: | Howell Creek Bay Creek |
| Bridges: | County Road M, unnamed road (x4), Oregon County 327, unnamed road, MO 19, E Adams Street, Warm Fork Road, US 63, W Walnut Street, US 63, unnamed road |
The Warm Fork Spring River is a stream in Oregon County, Missouri and northern Fulton County, Arkansas. The stream begins in western Oregon County at the confluence of Howell Creek and Elk Creek and the stream becomes the Spring River at its confluence with the cold springwaters of Mammoth Spring in northern Fulton County.
The stream was named due to the temperature difference between its waters and the cold springwaters entering from Mammoth Spring.[4] This is the only stream of this name in the United States.[3]
According to the Geographic Names Information System, it has also been known historically as:[3]