Yr Eifl is a mountain on the north coast of the Llŷn peninsula in Gwynedd, north-western Wales.
It has three summits, each quite separate from the others, and this is often supposed to be the source of the English name The Rivals. But this is merely an anglicised form of Yr Eifl, meaning "the forks" or "the strides" (Welsh: gafl, plural geifl).
On a clear day, the views from the top summit reach as far as the Isle of Man, the Wicklow mountains in Ireland and the Lake District, as well as the entire sweep of Cardigan Bay.
The view of Yr Eifl is especially striking from the SW coast of Anglesey, for instance from Llanddwyn island.
Read more about Yr Eifl: The Three Peaks, Surroundings