City of Mineola issued the following announcement.
FREE mulch is available at the Mineola Nature Preserve Hub Entrance on County Road 2724. You are welcome to bring a truck or trailer and load all that you want. The mulch comes from trees on the preserve that have fallen or been cut and is ground to mulch. Use the mulch for your garden or flower beds and help recycle the trees.
The Hub is an entrance to the Nature Preserve that is located on County Road 2724 between The Derby Entrance and the Appaloosa Entrance, all of which are (west) before you get to the Main Entrance. There is a pull-in and the pile of mulch is there free for the taking.
Original source can be found here.