The Whitewater River Run in Wyoming runs from the Outlet of Yellowstone Lake at Fishing Bridge to Lower Falls. The ideal streamflow range for this run is between 2,000 to 5,000 cfs, which typically occurs from late May to early July. This section of the river is rated as a Class III-IV run, making it suitable for intermediate to advanced paddlers. The segment mileage of this run varies depending on the put-in and take-out points, but it typically ranges from 9 to 13 miles.

The Whitewater River Run features several exciting rapids and obstacles, including the notorious "Fishing Bridge Rapid" and "Lava Falls". Fishing Bridge Rapid is a Class IV rapid with powerful hydraulics and technical maneuvers required to navigate it safely. Lava Falls is a Class III rapid with large boulders and challenging currents, providing a thrilling experience for paddlers.

There are specific regulations to the area, and a permit is required to run the river. Additionally, all boaters must wear a Coast Guard-approved personal flotation device, and motorized boats are not allowed on this section of the river. It is also important to note that the Whitewater River Run is located within Yellowstone National Park, so visitors must adhere to all park rules and regulations.

In conclusion, the Whitewater River Run in Wyoming offers an exciting and challenging experience for intermediate to advanced paddlers. With the ideal streamflow range, Class III-IV rating, and exciting rapids, this run is sure to provide a memorable adventure. It is important to follow all regulations and safety guidelines to ensure a safe and enjoyable trip.