I mean like 20-25 feet high slopes at about 40-60 degrees? I don't think a pushmower or self propelled mower would stay on the turf without wanting to slide down if I were to try and mow horizontally. Vertically, I might be able to go up but coming down would be a bear!....to say the least. I don't want to use a weedeater, it would look pretty rough. I know a ZTR couldn't handle it as well as any other riding mower. Is there any walk behind mower that could handle these slopes or what else is there??