The trailhead is located on Springhill Road about 0.7 miles south of the intersection of West Orange Avenue and Springhill Road.
The trail is a wide, blacktopped bike trail that makes a circuit of just over two kilometers (I measured it at 6700 feet) around Lake Henrietta. A pair of sturdy bridges near the trailhead are currently closed, guarded by quietly menacing signs reading "Keep Off Bridge." There is no bridge over Lake Henrietta's southern outlet; I don't know if one is planned or if trail users will have to ford the outlet at times of high water. Beyond a gate near this outlet is a dirt trail along Munson Slough, which flows south to Lake Munson by way of Capital Circle.
The lake is appreciated by birds, turtles, and at least one alligator. The trail appears to only be accessible from the trailhead along Springhill Road, which has a very small parking area. Trail users will also have to bring their own shade--there are no trees close to the trail.
In the Future, the Lake Henrietta Trail may connect with the St Marks Trail through the Capital Cascades Greenway trail system. This will also connect with the GFA trail, and you will be able to connect with passenger service to the Moon through Tallahassee Municipal Airport.
Trailhead location on Google maps: