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Routes
Road cycling routes
United Kingdom
Wales
South Wales
Old St Mellons

Radyr Weir – Cardiff Bay Barrage loop from Llanrumney

Routes
Road cycling routes
United Kingdom
Wales
South Wales
Old St Mellons

Radyr Weir – Cardiff Bay Barrage loop from Llanrumney

Moderate

5.0

(1)

27

riders

Radyr Weir – Cardiff Bay Barrage loop from Llanrumney

02:29

55.8km

410m

Road cycling

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: June 14, 2026

Tips

Includes a segment in which cycling is not permitted

After 34.4 km for 90 m

Waypoints

A

Start point

Bus stop

Get Directions

7.10 km

Coed y Goitre

Forest

2

18.7 km

Caerphilly Castle

Highlight • Historical Site

Caerphilly Castle is one of the largest castles still standing in the country and it’s definitely worth a visit if you’re passing. Check ahead to see opening times.

Tip by

3

21.5 km

Penrhos Cutting Cycle Path

Highlight (Segment) • Cycleway

A beautiful woodland ride along Penrhos Cutting cycle path linking Taffs Well and Caerphilly. Gentle gradient

Tip by

28.1 km

River Taff

Lake

5

28.5 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

33.7 km

Gabalfa Woods

Forest

7

34.5 km

River Taff and Footbridge

Highlight (Segment) • Cycleway

8

39.7 km

West Side of Cardiff Bay

Highlight • Lake

9

41.1 km

Coffee Lounge at Bayscape

Highlight • Cafe

Download the coffi app and order ahead

Tip by

10

43.2 km

Cardiff Bay Barrage

Highlight (Segment) • Structure

Separated pedestrian and cycle paths. Must be included on a scenic tour of Cardiff.

Tip by

B

55.8 km

End point

Bus stop

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Way Types & Surfaces

Way Types

32.0 km

18.5 km

3.30 km

1.97 km

< 100 m

Surfaces

45.5 km

8.91 km

1.29 km

< 100 m

< 100 m

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Elevation

Elevation

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

Highest point (120 m)

Lowest point (undefined)

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Weather

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Thursday 9 July

33°C

18°C

-- %

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Comments

July 19, 2025,Caerphilly loop
A peaceful early morning ride to Caerphilly. The first 45 minutes of the ride was a climbing and as always you are rewarded with some stunning scenery. The rain had set in, the higher I climbed, the wetter I got, but it was pleasant with the warm temperatures. A nice downhill into Caerphilly before joining the Taff Trail all the …
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