My lot is carved out of a steep hillside. Behind the house there is a very steep slope (30-45 degrees). The soil (at least for a large part of it) was entirely removed and replaced during the construction of my foundation. The topmost layer is several inches of loose topsoil covered with chipped wood.
I would like to set stones of some kind in the hillside to make it easier to navigate. What's the easiest way to do this? I'd like to avoid having to dig out several feet with a post hole digger and pour concrete for each one (although it's the Pacific Northwest, so I wouldn't have to go that deep). Ideally there would be some product I could drive into the ground like a T post and then top with a step.