I had a backyard area that I didn't care about one time and had a tree removal service deliver stuff to me for free. Many of these tree removal services and landscaping services will give you more than you want for free b/c otherwise they have to pay to get rid of it. I just called them, gave them my address and they dumped a huge dumptruck load on my yard.
A couple of negatives though
1. It was a huge ass pile that I had to move with a wheelbarrow to the areas I wanted it since the dump truck can't necessarily get close enough
2. It isn't the same size/type of wood throughout the mix. It's basically whatever crappy trees they removed recently.
3. It could contain molds and diseases if that's what was in the trees.
Like I said, for me it was perfect b/c I basically wanted to cover a large area with some sort of cover just to keep weeds away, but it was an area nobody could see and I didn't care about.