When you get to the top, the maze is in front of you; the entrance is on the far side by the stand of trees.
It isn't always this foggy, although the light is often unusual and sometimes quite beautiful.
If you walk the track, which is about a quarter of a mile long, treat it gently and don't walk on the grass. The maze has been maintained by some very nice people as a labour of love, although in the last year or so it's been badly damaged, so treat it gently, please.
Other mazes like this are called "Troy Town" and "Trip to Jerusalem". It's suggested that threading the maze on your knees counted as a pilgrimage.
It would be interesting to know if there was a badge like this one.
Whether or not you thread the maze, if it's near sunset, be sure to walk through the beech trees towards the setting sun. The trees cover the foundations of the old Norman chapel. Just occasionally, one's sense of place is rewarded with a sunset like this. It's enough to make you want to stay until it gets fully dark.
Afterwards, it's worth walking through the trees on the top and down the other side towards the "plague-pits". This is a great area for butterflies. I don't know what any of them actually are, but they're really nice to look at...