The ideal streamflow range for this river is between 500-1000 cubic feet per second (cfs), which typically occurs during the spring and early summer months. The Upper Green River is classified as a Class III-IV river, meaning it contains moderate to difficult rapids and obstacles that require precise maneuvering.
The segment mileage of the Upper Green River is approximately 13 miles, starting at Flaming Gorge Dam and ending at Little Hole. The river features several notable rapids, including the Swallow Canyon Rapid, Hell Hole Rapid, and S.O.B. Rapid. These rapids range from Class III to IV in difficulty and require technical skill and experience to navigate safely.
In addition to the rapids, the Upper Green River is also known for its stunning scenery, including towering red rock cliffs and lush vegetation. However, it is important to note that the area is protected as part of the Flaming Gorge National Recreation Area, and there are specific regulations in place to ensure the preservation of the natural environment. Visitors are required to obtain a permit for the use of the river and must follow all leave-no-trace principles to minimize their impact on the area.
Overall, the Upper Green River is a challenging and rewarding whitewater river run that offers both thrilling rapids and breathtaking scenery. However, it is important to approach this river with caution and respect for the environment to ensure a safe and responsible experience.
| Last Updated | 2025-06-28 |
| River Levels | 6970 cfs (13.41 ft) |
| Percent of Normal | 37% |
| Status | |
| Class Level | iii-iv |
| Elevation | ft |
| Streamflow Discharge | cfs |
| Gauge Height | ft |
| Reporting Streamgage | USGS 09234500 |
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