The Unnamed Tributary, also known as the Whitewater River, is a whitewater river run located in the state of Utah. The ideal streamflow range for this river is between 200-500 cfs, and it is rated as a class III-IV run. The segment mileage of the run is approximately 5 miles, and it includes several exciting rapids and obstacles, including "Satan's Gut," "The Cauldron," and "The Meatgrinder."

One of the unique features of the Unnamed Tributary is the "Satan's Gut" rapid, which is a technical and challenging section of the run that requires skillful maneuvering. "The Cauldron" rapid is another exciting feature, which involves a tight, twisting section of the river that requires precise navigation.

In terms of regulations, the Unnamed Tributary is located on public land managed by the Bureau of Land Management (BLM). Permits are not required for day use, but overnight camping permits can be obtained from the BLM office. Visitors are also required to follow Leave No Trace principles, as the area is a sensitive ecosystem.

Overall, the Unnamed Tributary is a thrilling whitewater run in Utah that offers challenging rapids and beautiful scenery. It is important to check current streamflow conditions and follow all regulations to ensure a safe and enjoyable experience.