Scant remains on the top of Garret Hill. A long, low line of rubble makes a rampart of about 150 metres, aligned north/south onto the passage tomb over the field wall. There's another very faint line at right angles on the northern end. There are probably (hopefully) more remains about the hill, but I couldn't find them. I was happy to be up here anyway – it's just above the contour line where things start to get wild and untamed and sheep thrive.
You can see evidence of some of the hill-fort ring that circles the tomb. I didnt walk all of it because of the cows but i would think this goes around half of the way around the tomb. It seesm to stop at a boundary wall where the other half of the circle should continue but doesnt.