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Hiking trails & Routes

South Wales

Radyr and Morganstown

Garth Summit – Radyr Weir loop from Radyr

Routes

Hiking trails & Routes

South Wales

Radyr and Morganstown

Garth Summit – Radyr Weir loop from Radyr

Hard

4.8

(6)

hikers

Garth Summit – Radyr Weir loop from Radyr

05:07

17.6km

440m

Hiking

Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: June 17, 2026

Waypoints

Start point

Train Station

Get Directions

7.50 km

View of Garth Mountain from Route des Alpes

Highlight • Viewpoint

The road to the South of Garth Mountain is named the "Route Des Alpes" on Google maps. I'm thinking it isn't genuine, but I like it!

The views from the …

Tip by

7.94 km

Garth Summit

Highlight • Viewpoint

Stunning little hill with commanding views just outside Cardiff with a trig pointed summit. It is a UK listed Marilyn.

Tip by

9.14 km

View of Taff Vale and Nantgarw from Rocky Descent

Highlight • Viewpoint

Rocky, narrow, but very scenic, descent into the woods with some glorious views across the Taff Vale toward Nantgarw.

Tip by

9.66 km

Carved Tree Face

Highlight • Natural

A dead tree has had a carving added to it. At Christmas 2023 the trees here were decorated.

Tip by

10.1 km

Gwaelod Y Garth Inn

Highlight • Pub

Good food, super friendly and thirst quenching.

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14.0 km

Fforest Fawr Information Board

Highlight • Rest Area

14.2 km

Castell Coch

Highlight • Castle

Castell Coch is a 19th-century castle overlooking the village of Tongwynlais. Whilst there has been a castle on the site since the Norman period, architect William Burges transformed the crumbling …

Tip by

16.4 km

River Taff

Lake

16.8 km

Radyr Weir

Highlight • Structure

A pretty weir of the River Taff, the Radyr Weir runs today as a hydro power scheme and a focal point of Radyr town. Many wild salmon and sea trout …

Tip by

17.6 km

End point

Train Station

Way Types & Surfaces

Way Types

7.98 km

4.93 km

2.90 km

1.43 km

397 m

Surfaces

6.44 km

6.25 km

1.79 km

1.41 km

1.16 km

545 m

Elevation

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

Highest point (300 m)

Lowest point (20 m)

Weather

Wednesday 24 June

35°C

22°C

0 %

Additional weather tips

Max wind speed: 18.0 km/h

to get more detailed weather forecasts along your route

Comments

October 11, 2025,The Garth Summit – Castell Coch loop from Radyr

Radyr (Rah-dir)….what can I say ?
We loved every bit of Radyr (Rah-dir), Taffs Well….etc
For some of us, this was our first time in Wales 🏴󠁧󠁢󠁷󠁬󠁳󠁿
The Loop had everything we wanted….
• The Garth Hill (Mynydd y Garth) at just over 1,000ft was perfect 👌…just as were the equally challenging descents ! But together @ Team Acorn conquered …

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Garth Summit – Radyr Weir loop from Radyr

View of Garth Mountain from Route des Alpes

Garth Summit

View of Taff Vale and Nantgarw from Rocky Descent

Carved Tree Face

Gwaelod Y Garth Inn

Fforest Fawr Information Board

Castell Coch

Radyr Weir

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