Name:Carreg y Diocyn
Hill number:2066
Height:673m / 2208ft
Parent (Ma):2053  Arenig Fawr
RHB Section:30D: Barmouth to Betws-y-Coed and Bala
Nuttall/Wainwright area:The Arenigs
County/UA:Gwynedd
Catchment:Dee (Flint)
Class:Deleted Nuttall
(xN)
Grid ref:SH 83095 36321
Summit feature:rock
Drop:14.25m
Col:659m  SH 83022 36326  
OS map sheet(s):(1:50k) 124 125
(1:25k) OL18E
Survey:Leica NA730
Survey of Carreg y Diocyn (Final).doc
GPS data:show GPS entries for this hill

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N.B. Some hill summits are on private property or on land where there is no public right of way.  Permission should be sought from the landowner where access to a hill summit is through private land.
Please report via the contact page any logs you see below which describe or encourage acts of trespass.  Please quote the hill number and hill name.

Logged Descriptions  (logged by 99 users, only the latest 50 shown - Show all)ByDate of Ascent
Parked at SH 8231 3924 for a circuit of 3 Dodds, 2 Nuttalls, 2 ex-Nuttalls and a repeat Marilyn. 5/8.PGCE25/01/2024
From Ystrodur Fawr. Very wet lower down - new Inov8 boots doing a reasonable job. A long way to go to bag a deleted Nuttall. I should have bagged it when passing in 2016 but in those days I considered collecting anything less than P100 ridiculous. Now I'm more enlightened and it's a good spot to appreciate the rough east face of Arenig Fawr. 7.8km, 365m, 2 hours.Wycombe Wanderer08/10/2023
with MFabioski13/04/2023
Added to the Nuttall walkcolinfielding08/10/2022
https://www.strava.com/activities/5652732190Sleepwa1ker16/07/2021
From layby on the B4391: Moel Llechwedd, Arenig Fawr, Arenig Fawr Sounth Top, Carreg Y Diocyn, Arenig Fawr South Ridge Top, Craig Y Bychau, Moel Llyfnant, Foel Boeth, Gailt Y Daren, Bwlch Y Bi, and Moel Y Slates. Warm day, views would have been better with less haze. Very tough walk, lots of boggy pathless parts.Lazylizzie12/06/2021
Diverted between Arenig Fawr and Moel Llyfnant.NormanW27/05/2021
Out and back after the South TopAlan Caine01/05/2021
2/5 with Rufus from dismantled railway to N at SH 82302 39249. Took track SW then S as far as stream at SH 82105 35983 marked ‘waterfalls’. Steep direct line to Arenig Fawr South Ridge Top then easy ground to Carreg y Diocyn, back across to ridge and over Arenig Fawr South Top, Arenig Fawr and Moel Llechwedd. Descended wide depression to W and ended up back on track at Amnodd-Wen. Quick round less than 3 hours walk.jacobrichmond07/04/2020
From Arenig FawrJamesD197217/09/2019
8.85 circular walk from Pant-yr-Hedydd, bagging Moel Llechwedd, Arenig Fawr, Arenig Fawr South Top, Carreg y Diocyn and Arenig Fawr South Ridge Top. Great weather and amazing views.fellowsa07/09/2019
With Richie from SH823392. Revisits of Moel Lechwedd and Arenig Fawr (also 22/09/08) followed by AF South Top, Carreg y Diocyn, AF South Ridge Top and Moel Llyfnant. Very wet and windy and the cloud only started to clear when we got to Llyfnant. Nice sunny decent and lovely walk down to Amnodd-wen, during which the birds, which had all been cowering in the undergrowth, suddenly sprang to life. We were treated to good views of a hen harrier, cuckoo, sparrowhawk, redstarts and buzzard.Herbert Anchovy08/06/2019
A horseshoe walk taking in Arenig Fawr, Moel Llyfnant and Foel Boeth. Parked in layby on B4391. Bit of an out-and-back detour to bag this one.Claireb 18/05/2019
full day on southern arenigs, arenig fawr, south top pt 712 carreg y doocyn, all moss tps, moel llyfnant, foel boeth, gallt y darren and back over bwlch y bi and moel y slatesunderhill06/05/2019
From Arenig Quarry SH83236 37726 via Moel Llechwedd, Arenig Fawr, Arenig Fawr South Top and Arenig Fawr South Ridge Top. Return via Llyn Arenig Fawr.Westdenewalker04/05/2019
Company: Soloiandesbottes22/02/2019
Moel Llyfnant, Foel Ystrodur Fawr, Foel Boeth, Moel Ymenyn, Arenig Fawr South Ridge Top, Carreg y Diocyn,Arenig Fawr South Top, Arenig Fawr and Moel Llechwedd. Another glorious dayAlunrees3303/07/2018
Redid Nuttall's 6.1 to include the two deleted ones.clivevilla16/08/2017
SoloAimless Rambler26/05/2017
4/7 Great walk on sunny day (Moel Llechwedd/Arenig Fawr/Arenig Fawr South Top/Carrig y Diocyn/Arenig Fawr South Ridge Top/Foel y Strodur Fawr/Moel Lyfant)Fergalh02/04/2017
Solo. Last of the Nuttalls (and xN's) in this group. Back to car at old rail track N.jonglew04/11/2016
From quarry parking area, along road to West then track to Llyn Arenig fawr, up Y Castell to Arenig Fawr, then South Top, round to Carreg y Diocyn then South Ridge Top, down toward Moel Llyfnant col, then good track along valley back to parking. Started sunny & warm, some cloud & light showers.apricorum26/08/2016
Steep descent after Arenig Fawr Soth top to bag this deleted NuttallCrib Goch12/04/2016
Nuttall walk 6.1: Moel Llechwedd - Arenig Fawr - Arenig Fawr South Top - Carreg y Diocyn - Arenig Fawr South Ridge Top - Arenig Fawr South Ridge Far South Top  - Moel Llyfnant - Foel Boeth - Gallt y Daren - Moel yr Wden - Moel y Slatesronaldo33302/04/2016
4 of 7. Moel Llechwedd, Arenig Fawr, Arenig Fawr South Top, Carreg y Diocyn, Arenig Fawr South Ridge Top, Foel Ystrodur Fawr and Moel Llyfnant.BobHancock19/03/2016
On Arenig traversenordicstar10/07/2015
with Frank on a lovely spring day. Nuttalls 6.1 with a few additions.Lou22/03/2015
With Lindsay Shaw and completing Walk 6.1 (Arenigs) in Nuttall Volume 1 Wales 2009 Edition plus this ex Nuttall. Nice warms day with blue sky.knarf22/03/2015
Loosely followed the Nuttalls Arenig Fawr route with a few additions.rhalstead17/03/2014
Revisited while marshalling for the Arenig Fawr mountain race, in a fine but very breezy day.RHW29/09/2013
As part of circular route up Arenig Fawr and on to Moel Llynfant, good route and great viewsemily01/09/2012
Nuttall route.Dugswell227/05/2010
a circular from the old quarry taking in llyn a.f. the peaks of arenig fawr and moel llyfnant. soggy in the bwlchstig_nest07/02/2008
With: solo; I parked at SH822392 and followed poor path SW then S below Arenig Fawr before taking straight line up to the top. Lots of crash debris and the memorial here. Took the ridge S over S top Carreg y Diocyn to S ridge top then drop N to path.Ian Baines20/09/2002
petey17/02/2001
GMGMTIdris19/09/1998
GMGMTmaryjdavies19/09/1998
Snowy tops run with Chris M (in Oct) magical.Up from N and circuit around to Llyfnant.Chris Pearson17/10/1992
Misty.Ian Davies24/09/1991
Minor diversion off the fencelineRhayader_wander27/01/1991
On route from Arenig Fawr to Moel Llyfnant - with KWJohnIvor16/08/1987
From Arenig FawrPeterD29/10/1983
rickeeling11/02/2024
Miflij26/07/2021
Richard Lawrenc08/06/2019
Neil Midgley22/10/2018
willias31/08/2018
PeteF11/11/2017
kev6522/08/2017
Mark Sims04/08/2017