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Name: | Twmbarlwm |
Hill number: | 15634 |
Height: | 418.6m / 1373ft |
Parent (Ma): | 2292 Mynydd Maen [Mynydd Twyn-glas] |
RHB Section: | 32C: Neath to Chepstow |
County/UA: | Caerphilly |
Catchment: | Usk |
Class: | Tump (400-499m) (Tu,4) |
Grid ref: | ST 24188 92612 |
Summit feature: | ground 12m WNW of trig point |
Drop: | 49m |
Col: | 370m ST251938 |
OS map sheet(s): | (1:50k) 171 (1:25k) 152 |
Observations: | top of castle mound, 200m E at ST 24386 92666, is just higher but unnatural |
Change log: | show changes for this hill entry |
GPS data: | show GPS entries for this hill |
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 94 users) | By | Date of Ascent |
Following the 1807 route on the Cwmcarn Forest website with a slight diversion to take in Medart as well as Twmbarlwm, nice views over the Bristol Channel though Medart is a pretty indistinguishable summit off piste of the track | lboutside | 13/01/2024 |
From ST 2486 9258. Between showers; very windy. | summitsup | 13/11/2023 |
Natural and unnatural, just in case. From east. | Martin R | 11/11/2023 |
On a visit to Cwmbran so I planned a nice little 13mi run incorporating visits to the summits of Twmbarlwm, Medart and Mynydd Twyn-glas. Parked at Henllys Nature Reserve (free parking) and made my way up from there. 
 
Twmbarlwm the easiest of the three summits to find; Mynydd Twyn-glas also has a trig point and not to challenging; Medart doesn't really have anything distinguishable, and there's an artificial raised bit near the summit. 
 
All in all it was a lovely route in the hills! | ewangibb87 | 11/11/2022 |
Mynydd Machen, Twmbarlwm | keithouk | 11/08/2022 |
From work | davecnash | 18/07/2022 |
Up from the east over fortifications | cjo | 27/06/2022 |
With KeithByTheC | JulieB | 22/03/2022 |
From Mynydd Twyn-glas heading S then SW along broad grassy ridge. | KeithByTheC | 22/03/2022 |
Sirhowy Valley Country Park - Mynydd y Lan - Cwmcarn - Cefn Rhyswg - Mynydd Twyn-glas - Twmbarlwm - Mynydd Machen - Sirhowy Valley | davidpettit84 | 20/11/2021 |
Run with Pauline from Machen via Cambrian Way over Mynydd Machen to Twmbarlwm and back | milejunkie | 13/11/2021 |
Footpaths up from Cwmcarn, forest drive closed. Good paths to trig and higher castle mound. I fail to see why the mound is not considered to be the high point, seems inconsistent to the approach taken on many other Tumps with old fortifications | Colin Crawford | 14/10/2021 |
After Medart. Visited summit, trig and higher bump to E. Returned to main Cwmcarn VC car park on footpaths and tracks. | PGCE | 03/08/2021 |
From Risca as part of the 2nd Leg of the Cambrian Way | geoffh12 | 25/07/2021 |
Parked in car park and walked straight up to trig. | Hippy77 | 18/06/2021 |
Walked up from new car park.Humid day | Pip56 | 23/07/2020 |
From Cwmcarn visitors centre. | Iam_JoshEdwards | 18/07/2020 |
Trigged Tump with rather gross plastic residue from a floral tibute to a dead dad. | vegibagger | 21/07/2019 |
1/2 After work. Parked at Twmbarlwm car park walked straight to summit. Good views from top, especially of other hills around newport and cardiff. Great name too | penbet | 12/06/2019 |
Crosskeys - Mynydd y Lan - Mynydd Machen - Medart - Twmbarlwm - Crosskeys. | Mark Jackson | 24/10/2018 |
Parked at barrier and took meandering route upwards using numerous fps. Found later on signs limiting access because of serious fire damage during the hot summer. Wet and misty today. | Campbell Singer | 15/08/2018 |
From the Twmbarlwm car park, west up to the fort and the trig pillar | Mariana Trench | 11/03/2018 |
Parking to E then easy stroll up, over the Motte then over to pillar, good condition, great views today. | griefmiester | 23/08/2017 |
From Cwmcarn Forest Visitors Centre to summit and return | akbunny59 | 05/07/2017 |
Parking at visitors centre. Medart first then on to here. Swathed in morning hill fog. | jonglew | 14/12/2016 |
From the car park to the east to bag the trig point and do some geocaching. | Father Ted | 07/09/2016 |
From South, after climbing Medart. Good views on a clear day. 
Visited Trig and Fort. | PeterD | 29/08/2016 |
YSM438 Twmbarlwm Difficulty 1 Terrain 3 - quite steep in places. Lovely sunny morning walk but very cold. Fort is well worth a look too. | thejackrustles | 06/03/2016 |
Part of LDWA Ravens Dare 26-mile chhalenge walk | liljonb | 03/10/2015 |
Part of a ridge walk including Mynydd Twyn-glas. The view from Twmbarlwm is superb, with the added interest of the hill fort. | Cas-gwent | 28/09/2015 |
Through forestry trails, summit ascent using steep trail from northwest. | forsterfamily7 | 22/08/2015 |
Up the steep hill from the Medart side. Was surprised how quickly the steep slope turned into the summit. | amarillo-oro-como | 04/05/2015 |
Walk with Hilary, Karen and Maggie.Followed circular walk from Cwmcarn visitorcentre between 5 to 8 miles distance. | Suzyj | 19/04/2015 |
Easy and popular climb from below, worth every second nice pull on way up great views...and don't miss the ancient ring fort ! | Fergalh | 16/11/2014 |
Part of Valleys 100. | Rob Pen y Garn | 24/05/2014 |
VALLEYS 100 | EVERTON | 24/05/2014 |
From Mynydd Machen, along line of leg 1 of LDWA Valleys 100 | Jim T | 15/02/2014 |
WHERE RAVENS DARE | EVERTON | 05/10/2013 |
On the Where Ravens Dare challenge walk with the LDWA | philhythe | 05/10/2013 |
Check-point on the Where Ravens Dare 15.5 mile walk organised by South Wales LDWA. | Al Fouracre | 06/10/2012 |
ST24200 92609 | Anton | 01/09/2012 |
With Catherine from Henllys, Cwmbran. It snowed on the top and we got soaked. Couldn't see a thing! Have done this a couple of times from Cwmcarn Forest Visitor Centre since then. There are lots of bilberries on top. | islamidget | 29/01/2012 |
On a very cold walk from Cwmbran station. It snowed on the climb up onto the ridge, but then stayed fine with a bit of sunshine. Patchy snow underfoot on the ridge and the summit. A first-rate hillfort with terrific views in all directions. Descended to visit the group of Bronze Age cairns at Mynydd Henllys, then down to Ty Sign to catch a bus. | thesweetcheat | 17/12/2011 |
Estimated date. Formerly, a favourite after-work hill. | huwthomas | 02/04/2008 |
visited many times with lovely hillfort and near by trig point last time i was here was completeing the raven's walk. | hodder | 30/12/2006 |
From Risca | peter4lc | 12/01/2006 |
fine summit & view, v fine Motte E of summit. steep tk from road to E | RHW | 08/11/2003 |
On Caerphilly Summits 30 Mile Challenge | PeterD | 05/07/2003 |
K Cambrian Way | crazy | 26/05/1996 |
Twmbarlwm Trek | EVERTON | 06/05/1989 |
TWMBARLWM TREK | EVERTON | 07/05/1988 |
On first day of Cambrian Way from Cardiff heading North | PeterD | 22/05/1982 |
Climbed many times. This date is an estimate of the first time. | gurney99 | 01/06/1979 |
Matt | 02/05/2023 | |
benwloudon | 12/02/2023 | |
Dawn Oldham | 11/08/2022 | |
AndyS | 06/07/2022 | |
Alex C | 07/02/2022 | |
TedCymru | 24/04/2021 | |
andrew brown | 08/12/2020 | |
manilena | 20/03/2020 | |
Bracken | 22/12/2018 | |
outlawcatcher | 10/10/2018 | |
asbown | 23/06/2018 | |
AJ&B | 01/06/2018 | |
kasharic | 12/05/2018 | |
salen | 10/05/2018 | |
Adrian | 14/03/2018 | |
BrianMatthews | 10/10/2017 | |
ngthack | 02/10/2017 | |
stevent0809 | 07/01/2017 | |
salen | 19/05/2016 | |
geoffh12 | 14/05/2016 | |
geoffreycurnock | 09/04/2016 | |
MichaelF | 09/04/2016 | |
PhilipChaston | 09/04/2016 | |
MM | 08/04/2016 | |
TGRS | 24/05/2015 | |
TREBORK | 01/01/2015 | |
tomandivy | 03/09/2014 | |
Ramblingpaul | 27/07/2014 | |
bogdodger | 24/05/2014 | |
Felltrekker | 24/05/2014 | |
Ash77 | 15/03/2014 | |
Jim.Fothergill | 17/11/2011 | |
davefh | 06/08/2010 | |
Dusty | 19/07/2008 | |
RichardM | 11/05/2004 | |
Tony J | 16/11/2003 | |
Swindon Bagger | 24/09/2000 | |
andrew.allum | 01/01/2000 | |
salen | 16/01/1994 | |
kanderson | 02/01/1955 | |
PeterKirkwood | 01/01/1950 |