Mormon Creek is a popular whitewater river run in the state of Wyoming. The ideal streamflow range for this river is between 150-500 cubic feet per second (cfs). It is classified as a Class III-IV run, which means it has moderate to difficult rapids with irregular waves and obstacles that require precise maneuvering. The segment mileage for this run is approximately 8 miles, starting near the town of Thayne and ending at the confluence of Salt River.

Some of the specific river rapids and obstacles on this run include the "Entrance Rapid," which has a tight entrance and requires good boat control, the "S-Turn Rapid," which has a series of closely spaced waves, and "Golf Course Rapid," which has a large hole and requires a strong ferry move to avoid it. It is important for paddlers to be experienced and have the appropriate gear, including a helmet and personal flotation device.

There are specific regulations to the area that paddlers should be aware of, including a permit requirement for commercial outfitters and a restriction on floating during the winter months when ice may create hazardous conditions. It is also important for paddlers to respect private property and avoid trespassing. Overall, Mormon Creek is a challenging and rewarding whitewater run for experienced paddlers who are prepared for its class III-IV rapids and obstacles.