Trails
An old website indicates this is 5 miles each way (10 miles total) from Don White to Willeo. I think it is 3.5 miles each way (7 miles) from end to end.
Regardless, it took us exactly 2 hours to walk from Azalea Park (the first parking lot at the .75 mile marker) to the "End" marker, and back.
All paved or packed gravel perfect for the stroller
Sun and shade along the trail
Playground
There are several playgrounds along the way in the first 1-2 miles.
Pictures