Llyn Brenig and Alwen Reservoir Walk – Two Lakes Trail

Route Summary:

Long route around both Llyn Brenig and Alwen Reservoir. An ideal walk for a winter’s day – if the roads are open.

Distance: 21 Kms

Ascent: 450 metres

Time: 6 hours or so

Start and Finish: Alwen Reservoir


The Llyn Brenig Visitor Centre is on the route while the nearest pub is the The Sportsmans Arms – though we suggest giving them a ring to check if they’re open (were open at time of writing)


Public Transport:


Parking at the start of the route

Post Code for Sat Nav: check the map

Weather Forecast:

Met Office Mountain Weather

Llyn Brenig and Alwen Reservoir Walk – Two Lakes Trail Details

The Two Lakes Trail in Mynydd Hiraethog takes you first around Alwen Reservoir (not to be confused with nearby Llyn Alwen!) before taking on the walk around Llyn Brenig. While the route looks reasonably flat, over the 21km it covers the ascent builds up to a not insignificant 400m or so. Those looking to just walk around Llyn Brenig rather than the full Two Lakes Trail, can view our Walk around Llyn Brenig post. Or for the Alwen Reservoir, read our description of the Alwen Reservoir Section here.

The route is also a great family cycle ride, with the trails all straightforward forestry tracks rather than a true mountain bike trail.

There’s the Llyn Brenig Visitor Centre to stop at on the way around – it’s well worth the small diversion.

Llyn Brenig and Alwen Reservoir Walk – Two Lakes Trail Route Map and GPX Download

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Download GPX file for GPS

The Route

Visit the route homepage here or print off the leaflet here.

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