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Blackweir Bridge and Weir – Radyr Weir loop from Cathays

Routes

Bike touring routes & trails

Blackweir Bridge and Weir – Radyr Weir loop from Cathays

Moderate

4.5

(15)

324

riders

Blackweir Bridge and Weir – Radyr Weir loop from Cathays

02:45

45.9km

260m

Cycling

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

Last updated: April 3, 2026

Tips

Includes a segment in which cycling is not permitted

After 1.87 km for 237 m

Waypoints

Start point

Train Station

Get Directions

1.56 km

Blackweir Woods

Forest

2.01 km

Blackweir Bridge and Weir

Highlight • Structure

Blackweir Bridge crossing the River Taff, was designed and constructed in the 1980s by engineering students at nearby Cardiff University. The students evidently liked the feel of the earth moving under their feet, it can be a bit bouncy!

Tip by

4.19 km

Llandaff Weir

Highlight • Natural

Llandaff Weir on the River Taff was built in the mid 1800s to help control the flow and water levels upstream. It was built in a dangerous rapid part of the river which had previously claimed several lives.

Tip by

10.8 km

View from Ynys Bridge

Highlight • Bridge

Unfortunately, the road over this bridge ends in a builder's yard. To access the Taff Trail from here you will have to negotiate the A470 junction.

Tip by

12.5 km

Wooded section of the Taff Trail

Highlight (Segment) • Trail

taff trail is lovely . small sections can be industrial, however I found this section through the trees particularly beautiful 🌳

Tip by

15.3 km

Coed Caedyrys

Forest

15.7 km

View of the Taff Valley

Highlight • Forest

So much gravel to wave a stick at...

Tip by

36.7 km

The Lewis Arms

Highlight • Pub

Always a good place to stop for refreshments. It’s a popular pub and can be busy at times.

Tip by

38.1 km

River Taff

Lake

38.6 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 can be found at the Weir, as well as grey herons and cormorants.

Tip by

40.3 km

Melingriffith Water Wheel

Highlight • Historical Site

45.9 km

End point

Train Station

Way Types & Surfaces

Way Types

37.4 km

4.30 km

1.69 km

1.52 km

512 m

432 m

< 100 m

Surfaces

42.3 km

1.91 km

1.38 km

334 m

Elevation

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

Highest point (100 m)

Lowest point (10 m)

Weather

Saturday 9 May

14°C

8°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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Blackweir Bridge and Weir – Radyr Weir loop from Cathays

Blackweir Bridge and Weir

Llandaff Weir

View from Ynys Bridge

Wooded section of the Taff Trail

View of the Taff Valley

The Lewis Arms

Radyr Weir

Melingriffith Water Wheel

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