The Whitewater River Run Preserve Boundary in the Big Sandy Unit to Confluence with Big Sandy Creek is a popular destination for whitewater enthusiasts in Texas. The ideal streamflow range for this river run is between 200-500 cfs. The class rating of the river varies depending on the segment, ranging from Class II to Class IV rapids. The segment mileage of this run is approximately 10 miles.

There are several notable rapids and obstacles on this river run, including "The Slot," "The Narrows," and "The Chute." These rapids offer challenging whitewater experiences for skilled paddlers. Additionally, there are several large boulders and downed trees that can create potential hazards on the river.

Specific regulations for this area include a permit requirement for overnight camping. Additionally, visitors are required to pack out all trash and human waste to maintain the natural beauty of the preserve. Fishing is allowed, but a valid Texas fishing license is required.

Overall, the Whitewater River Run Preserve Boundary in the Big Sandy Unit to Confluence with Big Sandy Creek is a thrilling and challenging whitewater destination in Texas. It is important for visitors to be familiar with the ideal streamflow range, class rating, segment mileage, specific river rapids/obstacles, and regulations to ensure a safe and enjoyable experience.