Large natural boulder resting on 2 smaller boulders, enclosing a small chamber that may have been utilised as an animal shelter. The top stone is 2m x 1.5m x1m. It rests on stones 1x1x0.6m and 1x1.4x0.4m. Marked as Maen Egryn on the 1887 OS map.
See RCAHMW Inevntory for Merionethshire (1921), p 83.
Recorded as part of Uplands Initiative Survey. R Hayman, H&H, 16/11/2010.