Dumb question perhaps...I don't know. I'm only used to pretty flat surfaces. Nothing over, say, 30 degrees, max.....(if that). Now I'm a stranger in a strange new land - and it can be freakin' hilly here! I can see that someone, somehow, has managed to cut some outrageous slopes around here and I can't figure out how. So what's the best way to handle steep inclines? A walk-behind? A self-propelled 21"'er a lot of grunting? Please don't tell me a weedeater or I'll break down and cry.