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  1. Home
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  3. Group walks
  4. Circular from Parc Cefn Onn to Craig y Alt

Circular from Parc Cefn Onn to Craig y Alt

Start:
Estimated Finish:
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Overview

Up and down east from Cefn Onn through a mix of woodland, river and fields north of the M4 of Cardiff.  In good visibility grand views as we circle the north and west side of Craig y Allt before climbing to the summit for views south.

Wednesday, 6 August 2025
Start time:
9:30 am
Estimated finish time:
3:00 pm
Difficulty:
Moderate
Distance:
16.1km / 10.0mi
Ascent:
N/A
Type:
circular

Local Grade: B

Starting point

Grid reference:
ST 17929 83541
Nearest postcode:
CF14 0UE
what3words:
rent.crash.crowned
Start time:
9:30 am

Entrance gate to Parc Cefn Onn

Upcoming walks with Cardiff Group

Join the walk.

Exploring the Waterhall Line

Start:

Difficulty:
Leisurely
Distance:
6.0 miles
hill

Penrhys and Rhondda Fach area

Start:

Difficulty:
Moderate
Distance:
8.0 miles
Looking across Blaengarw from Mynydd Llangeinwyr

Parc Calon Lan to Mynydd Llangeinwyr. Please register with walk leader.

Start:

Difficulty:
Moderate
Distance:
10.6 miles
Join the walk.

Upper Chapel and Honddu valley north of Brecon. Register with walk Leader Rob Smith 07590 570445

Start:

Difficulty:
Strenuous
Distance:
13.5 miles
Join the walk.

Asda Mountain, Sports Village, Ferry Road

Start:

Difficulty:
Leisurely
Distance:
4.0 miles
Rail Ramble

Cardiff Central Strollers: Do love to be beside the Seaside Linear from Barry Docks railway station

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Join the walk.

Roath Park & Reservoirs

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Join the walk.

Pontycymer and Blaengarw. Please register with Walk Leader

Start:

Difficulty:
Moderate
Distance:
11.0 miles
Coach Trip. Booking early essential.

Coach Trip Chipping Sodbury

Start:

Difficulty:
Moderate
Distance:
11.0 miles
Join the walk.

Craig yr Allt

Start:

Difficulty:
Moderate
Distance:
5.0 miles
Rail Ramble

Strollers Rail Ramble: Sarn to Tondu. Linear. Led by Rob. J

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Join the walk.

The Blorange and the Punch Bowl

Start:

Difficulty:
Moderate
Distance:
8.0 miles
Placeholder image

Toward Carreg Yr Ogof. Please register with walk leader.

Start:

Difficulty:
Strenuous
Distance:
14.0 miles
Rail Ramble

Pontlottyn via Bedlinog to Bargoed

Start:

Difficulty:
Moderate
Distance:
11.0 miles
Join the walk.

Llangiby near Usk Register with Walk Leader George S. 07722 656016.

Start:

Difficulty:
Moderate
Distance:
7.0 miles
Join the walk.

Black Mountains Northern Escarpment above & below. Numbers limited, please register with Walk Leader

Start:

Difficulty:
Strenuous
Distance:
15.3 miles
Join the walk.

Nant Fawr and the Reservoirs

Start:

Difficulty:
Leisurely
Distance:
4.0 miles
Placeholder image

Claire's Friday Morning Parc Cefn Onn Walk (woods, hills, countryside)

Start:

Difficulty:
Moderate
Distance:
6.0 miles
Cardiff Central Bus Interchange

Cardiff Central Strollers Barrage and Back

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Join the walk.

Craig Cerrig Gleisiad.

Start:

Difficulty:
Moderate
Distance:
9.0 miles
View of the Skirrid from Mynydd Garn Wen

Lasgarn Woods and Pontypool Folly - Please register with Walk Leader

Start:

Difficulty:
Moderate
Distance:
10.0 miles
Join the walk.

Wenallt Woods and the Ridgeway

Start:

Difficulty:
Moderate
Distance:
9.0 miles
Rail Ramble

Linear Rail Ramble - Rogerstone to Cross Keys

Start:

Difficulty:
Moderate
Distance:
9.0 miles
Bus Interchange

CBI Linear: Bridgend to Porthcawl

Start:

Difficulty:
Moderate
Distance:
7.0 miles
Pontsticill reservoir

Pontsticill, Pentwyn and Talybont reservoirs. Please register with walk leader.

Start:

Difficulty:
Moderate
Distance:
11.2 miles
Join the walk.

Barry

Start:

Difficulty:
Easy
Distance:
4.0 miles
Cardiff Central Bus Interchange

Cardiff Central Strollers: Cardiff City Parks & Gardens..

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
woods

Dinas Powy area

Start:

Difficulty:
Moderate
Distance:
8.0 miles
Placeholder image

Pontyclun to Llantrisant circular

Start:

Difficulty:
Moderate
Distance:
10.0 miles
Join the walk.

Wenvoe Circular

Start:

Difficulty:
Moderate
Distance:
7.0 miles
Placeholder image

Circular from Parc Cefn Onn to Craig y Alt

Start:

Difficulty:
Moderate
Distance:
10.0 miles
Join the walk.

Penarth Sully circular

Start:

Difficulty:
Moderate
Distance:
8.0 miles
Join the walk.

A Stroll up the Garth

Start:

Difficulty:
Moderate
Distance:
5.0 miles
Placeholder image

Claire's Friday Morning Parc Cefn Onn Walk (woods, hills, countryside)

Start:

Difficulty:
Moderate
Distance:
6.0 miles
Join the walk.

Cardiff Central Strollers: Roath Park - Waterloo Gardens Circular.

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Join the walk.

Brecon Town to Y Gaer via Battle

Start:

Difficulty:
Moderate
Distance:
9.0 miles
Coach Trip. Booking early essential.

Coach Trip Laugharne

Start:

Difficulty:
Moderate
Distance:
10.0 miles
Join the walk.

Cardiff Bay & Docks

Start:

Difficulty:
Leisurely
Distance:
4.0 miles
Placeholder image

Claire's Friday Morning Parc Cefn Onn Walk (woods, hills, countryside)

Start:

Difficulty:
Moderate
Distance:
6.0 miles
Join the walk.

Cardiff Central Strollers: Guest Leader

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Join the walk.

Penarth Circular

Start:

Difficulty:
Leisurely
Distance:
6.0 miles
Placeholder image

Newport Ridgeway, The Gaer, Tredegar Park, Bassaleg, High Cross, reservoirs and back via Allt-yr-yn

Start:

Difficulty:
Moderate
Distance:
10.0 miles
Bus Interchange

CBI Linear: Penarth railway station to City Centre

Start:

Difficulty:
Leisurely
Distance:
6.0 miles
Join the walk.

Llanthony circular via Twmpa & return. Numbers limited, please register with Walk Leader.

Start:

Difficulty:
Strenuous
Distance:
16.0 miles
Join the walk.

Penarth to Lavernock Point and Return

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Cardiff Central Bus Interchange

Cardiff Central Strollers: Visit Billy the Seal (Victoria Park) & Back.

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Sully Island at low tide

Cosmeston and Sully Island

Start:

Difficulty:
Moderate
Distance:
7.0 miles
Car park

Llangorse Lake and Mynydd Llangorse from Bwlch. Please register with Walk Leader

Start:

Difficulty:
Moderate
Distance:
11.5 miles
wood

Dinas Powy area

Start:

Difficulty:
Moderate
Distance:
8.0 miles
View from Coety mountain across Garn Lakes to Table mountain, Skirrid and Blorenge.

Varteg, Coety Mountain, Garn Lakes, Big Pit and the Dog Stone. Please register with walk leader.

Start:

Difficulty:
Moderate
Distance:
11.0 miles
Join the walk.

Erwood, Wye Valley (Register with Walk Leader)

Start:

Difficulty:
Moderate
Distance:
15.0 miles
Join the walk.

Cardiff Bay

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Join the walk.

Cardiff Central Strollers: Glamorgan Canal Nature Reserve.

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
View from Fan Frynach

Fan Frynach

Start:

Difficulty:
Moderate
Distance:
7.0 miles
Placeholder image

Botany Bay and Barbadoes. Please register with the walk leader

Start:

Difficulty:
Moderate
Distance:
11.0 miles
Rail Ramble

Explore Hengoed and Penallta area

Start:

Difficulty:
Moderate
Distance:
8.0 miles
Join the walk.

Penrhys Pilgrimage, Groesfaen to Llandaff

Start:

Difficulty:
Moderate
Distance:
7.0 miles
Placeholder image

Mynydd Dimlaith & Rhymney Valley Ridgeway. Please register with walk leader.

Start:

Difficulty:
Moderate
Distance:
10.0 miles
Join the walk.

Craig y Nos circular. Numbers limited, please register with Walk Leader.

Start:

Difficulty:
Strenuous
Distance:
15.0 miles
Placeholder image

Claire's Friday Morning Parc Cefn Onn Walk (woods, hills, countryside)

Start:

Difficulty:
Moderate
Distance:
6.0 miles
Cardiff Central Bus Interchange

Cardiff Central Strollers: Canal, Dock & Bay.

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Join the walk.

Cwmparc Circular including Bomb Memorial Site.

Start:

Difficulty:
Moderate
Distance:
10.0 miles
View of the Sugarloaf Mountain

Lonely Shepherd from Gilwern. Please Register with walk leader.

Start:

Difficulty:
Moderate
Distance:
10.0 miles
Coach Trip. Booking early essential.

Coach Trip Ludlow & Mortimer Forest

Start:

Difficulty:
Moderate
Distance:
10.0 miles
Placeholder image

Claire's Friday Morning Parc Cefn Onn Walk (woods, hills, countryside)

Start:

Difficulty:
Moderate
Distance:
6.0 miles
Join the walk.

Cardiff Central Strollers: Guest Leader

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Join the walk.

Radyr Circular

Start:

Difficulty:
Leisurely
Distance:
6.0 miles
Placeholder image

Hatterrall Hill and Garn Wen. Please register with walk leader in advance.

Start:

Difficulty:
Strenuous
Distance:
12.0 miles
Join the walk.

Exploring Porthkerry and Cwm Ciddy

Start:

Difficulty:
Moderate
Distance:
8.0 miles
Join the walk.

Southerndown Ogmore circular.

Start:

Difficulty:
Moderate
Distance:
8.0 miles
St Peter’s Church

Llanharan to the Taff Ely Ridgeway. Please register with walk leader

Start:

Difficulty:
Moderate
Distance:
10.0 miles
Cardiff Central Bus Interchange

Cardiff Central Strollers: tackle ASDA Mountain, Ferry Road

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Placeholder image

Llanthony and its Hills Contact Jim 07397276530

Start:

Difficulty:
Moderate
Distance:
9.5 miles
Join the walk.

Barry Waterfront

Start:

Difficulty:
Leisurely
Distance:
6.0 miles
hills

Defynnog to Fforest Fach and Crai. Please register with walk leader.

Start:

Difficulty:
Moderate
Distance:
10.0 miles
Placeholder image

Claire's Friday Morning Parc Cefn Onn Walk (woods, hills, countryside)

Start:

Difficulty:
Moderate
Distance:
6.0 miles
Cardiff Central Bus Interchange

Cardiff Central Strollers: Linear to Penylan Library.

Start:

Difficulty:
Leisurely
Distance:
5.0 miles
Join the walk.

Southerndown - Ogmore Circular

Start:

Difficulty:
Moderate
Distance:
8.0 miles
Placeholder image

Chepstow, Tidenham tunnel and the Devils Pulpit. Please register with walk leader. (Text preferred)

Start:

Difficulty:
Moderate
Distance:
11.8 miles
Cowbridge town hall meeting place

Hanging around Cowbridge

Start:

Difficulty:
Moderate
Distance:
7.0 miles

Join the Ramblers and enjoy

  • unlimited free access to 50,000 Ramblers group walks
  • a library jam-packed with thousands of tried-and-tested routes
  • a welcome pack teeming with top tips plus our Walk magazine
  • exclusive discounts from our partners
  • knowing your support is opening up more places to walk and helping more people discover the joy of walking
Join now for just £3.58 per month
Register for an account for FREE