10k Run Llangefni: Scenic Loop Around Llyn Cefni

Route Overview & Local Insights

Starting from the heart of Llangefni, this 10.2km loop offers a refreshing escape into the Anglesey countryside with almost entirely flat terrain, making it an ideal choice for runners looking for a consistent rhythm. The route follows a well-maintained, surfaced path from Lon Las out towards Llyn Cefni, transition into a scenic clockwise circuit of the reservoir. With only 36m of total ascent, you can focus on your pace and the stunning lakeside views rather than taxing climbs. The mix of paved sections and natural trails provides enough variety to keep your legs engaged while remaining accessible for all abilities.

Llangefni serves as the historic county town of Anglesey, and Llyn Cefni itself is a vital local landmark, acting as both a reservoir and a haven for diverse birdlife. As you run alongside the water, you are passing through a rich ecological corridor that supports red squirrels and various waterfowl, offering a peaceful contrast to the bustling market town atmosphere of the start point. This area was historically significant for its milling and trade, and the Cefni River, which feeds the lake, remains the lifeblood of the local landscape. It is a favorite spot for local Harrier clubs and recreational joggers alike who appreciate the serene, traffic-free environment.