There aren’t a lot of places you can (or should) bike down the Florida Trail, but the Lake Butler Trail in Union County is a nice country bike path that shares the trail with hikers.
Places to bike or walk on rail-trails in Florida
After more than two years under construction, the newest portion of the Coast-to-Coast Trail opened without fanfare through North Titusville and Mims in September 2017. I rode it on Labor Day to check it out.
Following a historic railroad route that was the spark for the Battle of Olustee during the Civil War, the Jacksonville-Baldwin Rail Trail is an excellent bike trail that spans 14.5 miles from Jacksonville to Baldwin.
With a corridor spanning nearly 50 miles through North Florida, the Palatka-Lake Butler State Trail provides paved trail for riders and an unpaved corridor used by the Florida Trail
A paved ribbon stretching the length of Pinellas County from St. Petersburg to Tarpon Springs, the Fred Marquis Pinellas Trail provides cyclists with more than 32 miles of low-stress cruising