| Sulphur Spring | |
| Location: | Hayden Valley, Yellowstone National Park, Park County, Wyoming |
| Coordinates: | 44.6547°N -110.4818°W |
| Elevation: | 7835feet |
| Hot Spring Type: | Geyser |
| Temperature: | 175F |
Sulphur Spring (also known as Crater Hills Geyser), is a geyser in the Hayden Valley region of Yellowstone National Park in the United States.[1] Sulphur spring has a vent Temperature of 89C although the actual temperature of the spring is 79.8C.It is located in the Crater Hills area of Hayden Valley about west of the Grand Loop Road.