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The Lower Green River Lake Outlet to Nf Boundary whitewater river run is located in the Bridger-Teton National Forest in western Wyoming. The ideal streamflow range for this segment is between 500-2000 cubic feet per second (cfs) during the late spring and early summer months. This stretch of the Green River is classified as a Class III-IV run, meaning it features powerful rapids and obstacles that require technical paddling skills and experience. The segment is approximately 8.5 miles long, and it offers a mix of continuous rapids and large drops that are sure to challenge even the most seasoned kayakers and rafters. Some of the notable rapids and obstacles include Hell's Half Mile, a steep drop that requires precise navigation, and the famous Big Kahuna, a large wave that can easily flip rafts and kayaks.

To ensure the safety of visitors to the area, there are specific regulations that must be followed. All boaters are required to wear a personal floatation device (PFD) and to carry a whistle and a throw rope. Additionally, all motorized watercraft must be registered with the Wyoming Game and Fish Department. Visitors are also expected to practice Leave No Trace principles by packing out all trash and avoiding damage to natural resources.