I'm halfway up my hill, but on the one flat portion of it. So all of the water seems to drain down 200-300ft to my area and just pools here before it drops off another 200ft toward the river just beyond my house. When I did my chicken run in 2017 we had a stretch of no rain for like 10 days and when I used the post hole digger the holes immediately filled with water right to near the top. It sucks. Maybe there's some clay too, but it doesn't seem that excessive compared to other places I've been.