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Name:Castell Dinas
Hill number:15616
Height:450m / 1476ft
Parent (Ma):2229  Waun Fach
RHB Section:32A: Llandovery to Monmouth
Nuttall/Wainwright area:Black Mountains
County/UA:Powys (CoU)
Catchment:Usk, Catchment Boundaries, Wye
Class:Tump (400-499m)
Grid ref:SO 17887 30111
Summit feature:cairn
Col:395m  SO180303  
OS map sheet(s):(1:50k) 161
(1:25k) OL13N
Observations:cairn is on ancient earthwork; natural summit not identifiable
Survey:obvious summit
Change log:show changes for this hill entry
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 66 users, only the latest 50 shown - Show all)ByDate of Ascent
12 mile walk from Waun Fach hamlet, walked across fields then along track following river all the way to Cwmfforest farm, on way we helped a sheep after it got its horn stuck in a fence. From Cwmfforest the path heading north east doesn't exist, it started quite promisingly with a stile but then the barbed wire fences were across the paths route so cut across to the road up to Rhyd-Y-Car, climbed up onto Pen.Y.Grib, then onto Castell Dinas, great views from both then descended west onto Mynydd Troeds slopes finding a contouring path up to the summit (2nd time bagged), from there walked along ridge to Mynydd Llangorse (2nd time bagged), up to the small pile of stones on summit, from there headed NE east and descended path (doesn't follow route shown on map) through Blaenau-Draw farm back to car. Afterwards drove to and bagged The Begwns. Perfect walking weather; sunny/windy and perfectly clear, could see for miles, saw about 20 people all day.DanTrig01/09/2019
Climbed this on a varied walk starting at the Pwll-y-Wrach waterfalls.roadbiker3228/05/2018
as per Adrianarranc27/05/2018
Fascinating hill fort summit with a more recent (but old) ruin. Access is good and it is the first top on the Y Grib ridge (apologies to Welsh for the tautology)- I guess the best way onto the Black Mountains. I continued to Waun Fach and returned to Pengenffordd via Pen Trumau, gravel/stone surfaced paths where there had been a wide, eroded peaty mess. I missed Castell Dinas in Jan 1991 when I did a similar walk over Waun Fach(qv)- was the issue access or light of day then?- I can't remember. Fine with just a 10 min shower today.pwheeler21/04/2018
Climbed with Kate, Ellie, Steve, and Loki from Dragonís Back car park. Cold and windy day, couldnít take Ellie further up the ridge. Beautiful spot.cdshear28/03/2018
Parked at the Dragon's Back car park (£2 for charity). Castell Dinas, Pen Y Grib and then on to Twyn Tal Y Cefn via Rhos Y Dirion. 10 miles.clivevilla16/11/2016
Parked in at end of RED Head lane at Pengenffordd (by house Dinas) - ascended via the Dragons Tale ( Bwlch Bach ar Grib - Pen-y-Grib - Pen-y-Manilwyn - Waun Fach - Pen-y-Gadair Fawr - Waun Fach - Pen Trumau - Rhiw trumau - Rhyd-y-Car - Castell Dinas (Ironage fort & Norman Castle remains)briandavies08/10/2016
Ample parking just before Dinas farm.Adrian27/08/2016
Parked in lane at Pengenfford and followed farm track.Ramblingpaul14/08/2016
dragons back pub cp, castell dinas, peny crib, rhos dirion, twmpa, twyn tal cefn, chwarel y fan, bal mawr tp, peny gadiar fawr, waun fach and back down y crib good day views and relatively quiet for bank holidayunderhill30/05/2016
On a JJ trip staying at The Dragon's Back bunkhouse, onwards then ending up in Crickhowell.Lou30/04/2016
On the way to Waun Fach etc from Pengenffordd.clyoung05/04/2016
Good final climb after a great day out, we climbed upm from the farm at Rhyd-y-Car after a long descent from Mynydd LlysiauDanMaisieBex14/02/2016
Visited on way back from Waun Fach and Pen y GribNumb28/10/2015
Killy training walk, clear at the car park. Climbed in to the cloud and some rain. A few views on offer on the way down.aussie196103/05/2015
With Swiftyfosbury200525/04/2015
Part of climb that included Castle Dinas, Pen Y Grib, Y Grib, Bwlch a'r Grib, Cwm Y Nant, Pen Y Manllwyn, Waun Fach. Twyntal Y CefnFergalh22/01/2015
Walking Group walk. Number one of five summits on this walk. Cloudy, fog on summits, very windy and isolated showers. Castell Dinas, The Dragons Back (Y Grib), Pen y Manllwyn, Waun Fach, Pen y Gadair Fawr, Mynydd Llysiau. Food at Nantyffin Cider Mill Inn afterwards. Distance = 20.14km. Average moving speed = 4.2km/h. Time moving = 4:50. Ascent = 1423m.paulnewby8111/05/2014
SO17887 30112Anton01/09/2012
Ascended following decent from Y Grib.Peapod2114/04/2012
446m (3m). Ruined stonework, W cairn higher. nice accessible summits: routes on openStreeMap; parking RHW02/04/2011
Visited en-route to Waun Fach.jonglew16/12/2007
2 day horseshoe from Abergavennyrbayfield12/09/2004
Ascended after descending from Mynydd Troed.JohnW10/07/2003
andrew brown09/11/2019
Rob Rees18/07/2019
Rob Rees11/03/2019
garethr10 01/05/2016
Steve Q08/09/2012