Achill Island https://www.greenway.ie/great-western-greenway/
It's a greenway located on Ireland's Atlantic coast. It starts in Westport and passes through the meadows and the views to Achill Island are truly beautiful. A short route, about 100 km round trip. We spent the night on Achill Island, on the beach right next to a campsite. All along cycle paths with no traffic, highly recommended.

Peninsula Beara Our most comfortable trip in Ireland, a place where time stands still, the quietest part of Ireland with few tourists. That means little traffic, plenty of back roads with incredible views, and camping areas. Everything we look for when we head out with our bikes loaded down. península de Beara   is one of the five penínsulas localizadas en la costa suroeste de Ireland, limítrofe con el río Kenmare (realmente una bahía), en el lado septentrional, y con la bahía de Bantry, al sur. Tiene dos sierras que recorren su centro: los montes Caha y los montes Slieve Miskish. La parte septentrional de la península, desde Kenmare hasta cerca de Ardgroom, está en el condado de Kerry, mientras que el resto queda en el condado de Cork.