After stopping by the campground and making a small donation, backtrack to pick up the posted mountain bike trail entrance. There is a small parking area if you don't have a campsite that is near the trailhead.
Starting out counter-clockwise, the trail is a nice flowing singletrack maintained by the forest service through a classic northwest Florida long leaf pine forest. After a mile or so, there will be a couple of dirt road crossings before reaching the top of the hill on the back side of the lake.
The trail then follows an old grassy lane which turns into slight downhill singletrack section. Eventually, it will lead to a gravel doubletrack river-crossing. Depending on the amount of rain, the crossing may have some flowing water to navigate. Once across the river, the doubletrack will climb sharply. At the top, look to the left for the singletrack back to the parking.