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Llyn Brianne Dam Crossing – Abergwesyn Valley loop from Garth

Routes

Bike touring routes & trails

Llyn Brianne Dam Crossing – Abergwesyn Valley loop from Garth

Hard

riders

Llyn Brianne Dam Crossing – Abergwesyn Valley loop from Garth

06:23

85.0km

1,440m

Cycling

Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: March 19, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Nant Irfon National Nature Reserve

Waypoints

Start point

Train Station

Get Directions

10.3 km

Caffi Sosban

Highlight • Cafe

Great friendly cafe with a lovely garden.

Tip by

12.4 km

Irfon Valley Road

Highlight (Segment) • Cycleway

A beautiful narrow road that winds up the Irfon valley from Llanwrtyd to Abergwesyn.

This is a quiet valley, often with its own microclimate.

On a good day in the …

Tip by

34.1 km

View of Llyn Brianne Reservoir

Highlight (Segment) • Lake

Llyn Brianne is a beautiful place for a bike ride. You can stop here or carry around to the view point on the opposite side

Tip by

38.5 km

Llyn Brianne is a spectacular reservoir at almost 300m (990ft) above sea level. It is Wales second largest reservoir by volume and is contained by a 91m (300ft) stone-built dam, which is the largest of its kind in Europe.

Tip by

42.9 km

Allt y Fedw

Forest

61.1 km

Cwm Du

Ruins

62.1 km

Dolgoch Hostel

Highlight • Mountain Hut

An Elenydd Wilderness Hostel. A simple and friendly hostel, hidden away in it's own secluded valley. Hot showers, loads of bunk beds and self catering kitchen. A really lovely place to stay.

Tip by

65.6 km

Devil's Staircase Climb (Abergwesyn)

Highlight (Segment) • Trail

Deep in the wilderness lies a hill that needs no introduction, the Devil’s Staircase, and it’s the opportunity to tackle this beast that will lure many to sign up for …

Tip by

67.5 km

Abergwesyn Valley

Highlight (Segment) • Gorge

One of the most beautiful stretches of road in Wales or maybe the world, this valley from Abergwesyn to the well-known and much feared Devil's Staircase is an incredible place …

Tip by

85.0 km

End point

Train Station

Way Types & Surfaces

Way Types

59.7 km

15.9 km

5.72 km

2.13 km

1.56 km

Surfaces

59.2 km

11.9 km

8.81 km

5.12 km

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (500 m)

Lowest point (160 m)

Weather

Thursday 21 May

21°C

12°C

0 %

Additional weather tips

Max wind speed: 18.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Llyn Brianne Dam Crossing – Abergwesyn Valley loop from Garth

Caffi Sosban

Irfon Valley Road

View of Llyn Brianne Reservoir