Blackweir Bridge and Weir – Radyr Weir loop from Cogan

Bike touring routes & trails

Blackweir Bridge and Weir – Radyr Weir loop from Cogan

Moderate

riders

Blackweir Bridge and Weir – Radyr Weir loop from Cogan

02:51

40.7km

370m

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: August 21, 2026

Tips

Cycling is not permitted along parts of this route

After 7.29 km for 90 m

After 13.9 km for 160 m

Waypoints

Start point

Train Station

Get Directions

7.28 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!

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17.3 km

Graig Hill

Highlight • Trail

Insanely steep

Tip by

17.7 km

View of the Valley

Highlight • Viewpoint

Good route across up over the fields that then crosses the road. More gravel / mtb than touring bike.

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17.8 km

View of Caerphilly

Highlight • Viewpoint

Caerphilly is surrounded by lots of rolling hills and countryside. You can enjoy great views on a bike ride or hike nearby to the town.

Nearer to the centre, Caerphilly Castle is worth visiting.

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18.6 km

Coed Tranch-yr-Hebog

Forest

19.2 km

Technical Forest Trail

Highlight (Segment) • Forest

Technical (but fun) trail. Rocky, rooty, and sometimes muddy following rain. Keep alert for your line choice.

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23.2 km

Fforest Ganol

Forest

26.5 km

River Taff

Lake

27.0 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 …

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30.7 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.

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34.9 km

Cardiff Castle

Highlight • Historical Site

Cardiff Castle is situated within picturesque parklands at the heart of the Welsh capital. The site has a rich 2,000-year history; from Roman fort, to Norman keep and eventually to stone-built castle. You experience great views from the castle.

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