Ruben,
You should give the Withlachoochee Trail a try. Essentially just as flat, but thre's a curve here and there over the 46 mile route. About the same as the Van Fleet, just a handfull of very low traffic crossings. Easy to add a few extra miles in either at the turn around or along the way to make it a nice century. Easy to pick up near Dade City - Trailhead is approximately a mile South of US 301/98 & CR 575 in Trilby, FL