Here's a picture from our Porthmadog trip. Pared y Cefn hir looks like quite a dramatic hill from this viewpoint above Tyddyn mawr, but it's only about 150 mtres higher than where the photo was taken.
The hill tops out at below the 400 metre contour, and is easily climbed from nearby Llynau Cregennen. It has a Fort on its summit ridge.
We must go up it sometime.
[Meanwhile, we hope Dot is ok as her phone was constantly engaged tonight; she was probably sitting on it.]