The Esplin Gulch segment (45-45A) of the Whitewater River is located in southern Utah and is a popular destination for whitewater enthusiasts. The ideal streamflow range for this segment is between 400-800 cfs, providing class III-IV rapids. The segment is 5.5 miles in length and features notable rapids such as "The Narrows" and "The Gauntlet".

There are specific regulations in place for this area, including the requirement for all boaters to wear a personal flotation device at all times. Additionally, no glass containers are allowed on the river and all trash must be packed out.

It is important for boaters to also be aware of potential hazards such as rocks and fallen trees, as well as changes in weather conditions that may affect the streamflow. It is recommended to consult with local guides or the Bureau of Land Management for current conditions before embarking on this segment.