The East Fork Segment 40A-41 of the Virgin River in Utah is a popular whitewater river run for experienced kayakers and rafters. The ideal streamflow range for this segment is between 200 and 400 cubic feet per second (cfs), which provides the perfect mix of challenging rapids and navigable terrain. The class rating for this section of the river is Class III, which means that it is considered moderately difficult with moderate waves and obstacles that require experienced paddling skills.

This segment of the Virgin River covers a distance of approximately 9 miles and features several notable rapids and obstacles, including the "Double Dip" and "Miles of Smiles" rapids. The "Double Dip" rapid is a technical drop that requires precise navigation, while "Miles of Smiles" is a longer series of rapids that provide a thrilling and challenging ride.

In terms of regulations, all boaters are required to have a permit to access this section of the river. The permit system is managed by the Bureau of Land Management (BLM), and permits can be obtained online or at the BLM office in St. George, Utah. Additionally, all boaters are required to follow Leave No Trace principles and pack out all trash and waste.