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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, only the latest 50 shown - Show all) | 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 |
Matt | 02/05/2023 | |
benwloudon | 12/02/2023 | |
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 |
Dawn Oldham | 11/08/2022 | |
From work | davecnash | 18/07/2022 |
AndyS | 06/07/2022 | |
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 |
Alex C | 07/02/2022 | |
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 |
TedCymru | 24/04/2021 | |
andrew brown | 08/12/2020 | |
Walked up from new car park.Humid day | Pip56 | 23/07/2020 |
From Cwmcarn visitors centre. | Iam_JoshEdwards | 18/07/2020 |
manilena | 20/03/2020 | |
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 |
Bracken | 22/12/2018 | |
Crosskeys - Mynydd y Lan - Mynydd Machen - Medart - Twmbarlwm - Crosskeys. | Mark Jackson | 24/10/2018 |
outlawcatcher | 10/10/2018 | |
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 |
asbown | 23/06/2018 | |
AJ&B | 01/06/2018 | |
kasharic | 12/05/2018 | |
salen | 10/05/2018 | |
Adrian | 14/03/2018 | |
From the Twmbarlwm car park, west up to the fort and the trig pillar | Mariana Trench | 11/03/2018 |
BrianMatthews | 10/10/2017 | |
ngthack | 02/10/2017 | |
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 |
stevent0809 | 07/01/2017 | |
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 |
salen | 19/05/2016 | |
geoffh12 | 14/05/2016 | |
geoffreycurnock | 09/04/2016 | |
MichaelF | 09/04/2016 | |
PhilipChaston | 09/04/2016 |