I found shade cloth to be wanting here during the summer. So I use tarps instead. Keeps the area MUCH cooler than shade cloth.
If you're on a north slope, pay attention to the wind patterns. Ordinarily the south should be open and the north protected but since you're on a hill you might have a different pattern, i.e. cold rolling down the hill, etc. On flat land, you'd want the south and east open and the west and north protected as that's the way our winds work, south and east breezes in summer, north and west cold winds in the winter. But as I said, you're on a hill so that could be different for you.
We bought shade cloth years ago that is thicker and blocks the heat/light but has lasted longer than tarps do in our wind. But we ran out of the good cloth and so the newest runs have shade cloth that is not as thick. We ended up double layering the thinner stuff and it gives the deeper shade like the old thicker cloth. I found a new online site for shade cloth - can get it in varying densities and even with shipping, was comparable to buying it locally - www.greenhousemegastore.com. Ordered some for our garden.
I put the shade cloth on the sides and that helps with even more shading than just top cover alone, but I leave it elevated 2 feet off the ground - otherwise it blocks wind and gets too hot. And when the wind is barely there in the summer anyway, blocking the tiniest breeze makes it worse. But the sides being covered help as the sun moves around during the day. Our coops are also elevated 2 feet off ground for deepest shade for the chickens to get under.
Gotta be creative sometimes.