Shannon has lots of summits in the 'Carns' list. I climbed this the day after the MountainViews expedition to Puffin and Scarriff Islands in Kerry, and I was hoping for a short walk on the way home. Being short of time I drove up a track and parked near a gate without causing an obstruction.
I headed up over the open ground and returned by a steep track next to the forest. The point where I left the forest edge to head back to my car was wet, boggy and difficult and not really recommended unless you have good wet gear. But these are the things that add excitement and effort to otherwise straightforward hills.