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South Wales

Rudry

Caerphilly Mountain Summit – Cefn Onn Quarry loop from Rudry

Routes

Hiking trails & Routes

South Wales

Rudry

Caerphilly Mountain Summit – Cefn Onn Quarry loop from Rudry

Moderate

hikers

Caerphilly Mountain Summit – Cefn Onn Quarry loop from Rudry

04:18

15.0km

360m

Hiking

Moderate hike. 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: May 12, 2026

Waypoints

Start point

Parking

Get Directions

53 m

Picnic Area with Benches

Highlight • Rest Area

Nice place to park with benches for having a picnic before or after starting the walk!

Tip by

3.41 km

Mynydd Rudry

Highlight • Viewpoint

Best way up on a bike - use the lower right hand route then go up the side of the mountain from in a SE direction. You can then choose the fun route down!

Tip by

3.50 km

Wern Ddu Clay Pit Nature Reserve

Highlight • Historical Site

Wern Ddu is an SSSI, the quarry workings being around 150 years old and leaving exposed geology that is a little bit older (estimated 300 million years previous).

Tip by

6.26 km

The Warren

Forest

7.70 km

Caerphilly Mountain Summit

Highlight • Viewpoint

Great little view point with a nearby cafe and large car park. Top spot.

Tip by

11.1 km

Coed Tranch-yr-Hebog

Forest

11.4 km

Cefn Onn Quarry is a former slate quarry in Cardiff. It is situated next to Coed Tranch-yr-Hebog and Wern Ddu forests. Enjoy some lovely views from here over the surrounding Vale of Glamorgan and nearby towns.

Tip by

11.9 km

Cefn Onn

Highlight • Forest

12.4 km

Coed Cefn-onn Woodland Path

Highlight (Segment) • Forest

This forested ridge sits amongst the area of woodlands to the south east of Caerphilly. Both the Cambrian Ridgeway and the Rhymney Valley Ridgeway Walk traverse the ridge and the bridleway is particularly beautiful and vibrant in summer.

Tip by

15.0 km

End point

Parking

Way Types & Surfaces

Way Types

8.77 km

3.84 km

1.18 km

862 m

280 m

< 100 m

Surfaces

8.33 km

2.25 km

1.83 km

1.27 km

1.03 km

275 m

Elevation

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

Highest point (260 m)

Lowest point (110 m)

Weather

Monday 6 July

27°C

14°C

0 %

Additional weather tips

Max wind speed: 15.0 km/h

to get more detailed weather forecasts along your route

Comments

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Caerphilly Mountain Summit – Cefn Onn Quarry loop from Rudry

Picnic Area with Benches

Mynydd Rudry

Mynydd Rudry Summit Marker

Wern Ddu Clay Pit Nature Reserve

Caerphilly Mountain Summit

Cefn Onn Quarry

Cefn Onn

Coed Cefn-onn Woodland Path

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