The Whitewater River Run Segment A, from Mouth of Spring on Ocala NF to Alexander Springs Wilderness Boundary, is a 4.5-mile stretch of the river that is ideal for intermediate paddlers. The ideal streamflow range for this section of the river is between 100 and 300 cfs. The class rating for this run is Class II-III, with rapids that are moderately difficult and require some maneuvering.

One of the main rapids in this segment is the Little Alexander Rapid, which is a Class III rapid that requires careful maneuvering. There are also some smaller rapids and obstacles throughout the run, such as rocks and trees in the water.

It is important to note that this section of the Whitewater River is located within the Ocala National Forest, and there are specific regulations in place to protect the natural environment. Visitors are required to obtain a permit before paddling on the river, and there are restrictions on camping and fires in the area.

Overall, the Whitewater River Run Segment A is a challenging and exciting run for intermediate paddlers. However, visitors should be aware of the regulations in place and take steps to protect the natural environment while enjoying the river.