I chain sawed a couple of trees that were down in the community park beside our property. Then split the segments.
The contrast is crappy--I hate taking pictures in the bright sunlight--but this is approx 5 wheelbarrow loads of white ash, not quite as BTU-intensive as oak but OK nevertheless.
On a typical winter day I load the wood stove about 4 times, with 6-8 pieces like the ones in the image. About 6 cords/winter. So I'm always looking for some free hardwood.
The next day I was sore. Not used to that maul swinging work. I'm counting this effort as cross training to support my Ultrarunning habit.