finally remembered another nice easy rails to trails, at Winter Garden - this is really nice and great coffee shops there also!
Are you anywhere near Kissimmee as there is a club in Celebration who organise rides of 30 to 60 miles.
I have a great little book about all sorts of rides in Florida from quite roads to off road mountain bike type trails. But it is in my house in Florida (I live in the UK) so not much help there I'm afraid. I'm due to be back there in September so if still interested will post the details.
If you do find other be much appreciated if you can post them here as I'm always looking for something new.