Lon Eifion Cycleway Overall Rating: ⭐⭐⭐⭐ Lon Eifion Cycleway is a 12.5 mile traffic-free route, running from Caernarfon to Bryncir. Offering a range of views, from rich woodland to spectacular mountains (at one point you can see Snowdon) it is cycling heaven. The name simply means Eifion's Lane. The name is from the district in