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Hiking trails & Routes

Pen y Gadair Fawr Summit Cairn – Pen y Manllwyn Summit loop from Castell Dinas

Hiking trails & Routes

Pen y Gadair Fawr Summit Cairn – Pen y Manllwyn Summit loop from Castell Dinas

Hard

4.5

(10)

63

hikers

Pen y Gadair Fawr Summit Cairn – Pen y Manllwyn Summit loop from Castell Dinas

06:13

18.0km

920m

Hiking

Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: August 7, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Bannau Brycheiniog National Park

Waypoints

A

Start point

Parking

1

18 m

The Dinas Castle Inn

Highlight • Pub

Good starting point for the dragons back route or Waun Fach. Enough spaces for 20ish cars if you get there early. £5 in the honesty box. Drinks & toilets in the pub for afterwards

Tip by

2

793 m

Castell Dinas Hillfort and Castle Ruins

Highlight • Viewpoint

The highest castle in England and Wales, actually missed this initially until I looked at my GPS and realised it was the castle.

Tip by

3

2.85 km

Stone Wall in Bannau Brycheiniog National Park

Highlight • Structure

4

10.1 km

Pen y Gadair Fawr Summit Cairn

Highlight • Viewpoint

In terms of height, Pen y Gadair Fawr plays second fiddle only to Waun Fach as the Black Mountains' second highest summit. However, where Waun Fach's top is broad and …

Tip by

5

12.2 km

Waun Fach Ordnance Survey Marker

Highlight • Monument

6

13.1 km

Pen y Manllwyn Summit

Highlight • Natural Monument

Pen y Manllwyn 773.71m (2538ft)
Jones and sub Marsh summit

Tip by

7

13.9 km

Dragon's Back Ridge (Y Grib)

Highlight (Segment) • Trail

The long ridgeline from Pengenffordd and up over Y Grib is known as the Dragon's Back. This is because of the narrow rising and falling ridge which looks like a dragon. It's a great walk with excellent views.

Tip by

B

18.0 km

End point

Parking

Way Types & Surfaces

Way Types

8.88 km

7.15 km

2.02 km

Surfaces

11.7 km

2.47 km

2.22 km

1.69 km

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Elevation

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

Highest point (800 m)

Lowest point (310 m)

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Weather

Powered by Foreca

Friday 9 October

12°C

7°C

16 %

Additional weather tips

Max wind speed: 18.0 km/h

to get more detailed weather forecasts along your route

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