Ok.....my backyard is about 3/4 of a mile of woods going down a hill into a holler at the bottom. Problem is, there are a few houses down there. I'm assuming, because of the houses, that's it's not okay for me to take the occasional pot-shot with a .22. But I felt it was worth asking, so is it?
I would be hesitant to do that due to the fact that a kid or neighbors pet might accidently be in the area. Obviously you can shoot in your area. So I would advise building you a backstop. If you are only shooting a 22 cal You could bet two railroad ties for example. Sink them in the ground vertically and secure them with some sakrete. Tac on a piece of rubber sheeting on the back side of the front sheet.(You can get at Lowes, Menards, Home Depot) Then screw 3/4 inch plywood on the front and back spanning between the two posts. Fill it with fine sand and you will have a good 22 cal backstop and eliminate any disasters. When it wears out down the road. Just replace the front panel and the sand. Pretty cheap insurance and a lot of enjoyment.
Also a hint! Move the target around on the face of the target backstop and it will last much longer.
I wouldn't recommend firing toward their houses. .22's have a terrible way of bouncing and doing what they aren't supposed to, and murphy's law hasn't been repealed. However, sounds like you could shoot towards your own house from your backyard, using your own hill as a backstop.