There is a fee to enter at the gate but the trails are tremendous. Lots of animals and different terrain. Not many riders and occasional hikers but it is a lot of fun. Gators, hogs, deer, turkeys, scrub jays, turtles can be seen at any time.
Hwy 60 east out of Lake Wales. Go north on Boy Scout Rd. At end of rd turn right (east) on Camp Mack Rd. Go approx 5 miles to the entrance of Lake Kissimmee State Park. (Well marked you can't miss it.)
http://www.singletracks.com/item.php?c=1&i=3573