Mawddach Trail & Cregennan Lakes loop from Barmouth — Snowdonia National Park

The Mawddach Trail & Cregennan Lakes loop from Barmouth offers a diverse touring cycling experience, combining flat estuary paths with challenging mountain climbs. You will cycle 20.7 miles (33.3 km) with a total elevation gain of 1418 feet (432 metres), making it a moderate ride that typically takes around 2 hours and 19 minutes. A highlight is crossing the historic Barmouth Bridge, a Grade II-listed wooden viaduct, which provides exceptional coastal views before you head towards the tranquil Cregennan Lakes nestled under Cadair Idris.

Planning your ride, you should know that the Mawddach Trail section is mostly flat and traffic-free, suitable for many abilities. However, the climb to Cregennan Lakes involves a sustained ascent on quiet mountain lanes, and the descent afterwards is very steep with hairpin bends, requiring careful riding. The route is often suggested to be cycled clockwise to make the climb more manageable. Surfaces vary from smooth gravel on the estuary to paved roads and potentially unpaved segments in the mountain sections.

This route is celebrated for its spectacular and varied scenery, transitioning from the rich wetland and woodland habitats of the Mawddach Estuary to the remote beauty of the Cregennan Lakes. The Mawddach Trail itself follows a disused railway line, offering a glimpse into the region's industrial past. The estuary is also a site of special scientific interest, home to two RSPB reserves, making it a great spot for wildlife viewing.