Visited this site yesterday (19/12/04). Though small the location of this five stone circle is incredible. We got there at around 9am as the Sun was rising in a clear blue sky behind Simon’s Seat. Weather was cold, frost on the ground and snow on the hill tops.
The circle appears to be based around one natural boulder. At the particular time of day the shadow cast by this stone bisected the circle and pointed in the direction of the snow covered Whernhside away in the distance.
As other people have correctly stated the hillside is strewn with large stones. There does appear to be some evidence for an outer circle. One large flat 7 foot high stone with a flat base now lays on the ground directly in line with the largest stone in the circle. Other largish stones are also found if you pace the same circumfrence, the weathered striations down the sides suggested that they once stood upright.
Further down the hill, on the way back to the Grimdale Reservoir entrance we found a solitary standing stone, lined up with a boulder.
A great site, well worth a visit.