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Name: | Pen y Boncyn Trefeilw |
Hill number: | 2110 |
Height: | 646m / 2119ft |
Parent (Ma): | 19413 Foel Cedig |
RHB Section: | 30E: Bala to Welshpool |
Nuttall/Wainwright area: | The Berwyns |
County/UA: | Gwynedd |
Catchment: | Catchment Boundaries, Dee (Flint), Severn |
Watershed: | Severn Estuary, Cardiff to Cape Wrath, Liverpool Bay |
Class: | Simm, Hewitt, Nuttall, Buxton & Lewis, Bridge (Tu,Sim,Hew,N,BL,Bg) |
Grid ref: | SH 96235 28322 |
Summit feature: | cairn on grassy knoll in field |
Drop: | 57m |
Col: | 589m SH973278 |
OS map sheet(s): | (1:50k) 125 (1:25k) OL23E |
Observations: | about 10cm higher than pile of stones 38m away at SH 96265 28345 |
Survey: | Abney level |
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 394 users, only the latest 50 shown - Show all) | By | Date of Ascent |
Linear walk with Jonny on a very wet Tuesday. Returning to the area to reclaim all the welsh Hewitts. (Foel Cedig reclassified). | zaul_uk | 02/01/2024 |
First Nuttall of the day, easy going at this point using the forestry track. | simocity | 15/10/2023 |
With Foel Cedig. | Peterb | 28/08/2023 |
Walk 7.5 | KatyT | 12/05/2023 |
With: solo; Nuttalls walk 7.5. Good dry day with light wind and high cloud | Ian Baines | 09/10/2022 |
Updated Nuttall 7.5 from Bwlch yr Hwch: Foel Goch, Trum y Gwragedd (Trum y Gwrgedd), Foel y Geifr, Pen y Cerrig Duon, Pen y Boncyn Trefeilw, Stac Rhos, Cefn Gwyntog North Top, Cefn Gwyntog, Cefn Gwyntog Far North Top, Foel Cedig and Y Groes Fagl. Haxy, dull day, so there weren't even good views to distract from the relentless trudge through heather. | Lazylizzie | 03/09/2022 |
4th Mountain today. 
Not the best walk down from Foel Y Geifr, struggled to find a path through the deep heather, headed for the Hirnant col where you can see a track going up the hill. From here follow the road all the way to the next top. | Buckleymon | 15/08/2022 |
Risked taking my car up the open track. A bit rough in places but driveable with care... From the track | vegibagger | 07/06/2022 |
On the way to Foel Cedig | Minto | 25/05/2022 |
Tackled on return journey,by which time some low cloud had cleared, sticking to grassy side of fence. Great views of Arans with fresh dusting of snow overnight. | Nick Canute | 05/03/2022 |
See Foel Cedig | JulieB | 02/01/2022 |
From road/track junction at pass. West to Foel y Geifr then north over 612m top and on to Foel Goch and return to pass. Then east along good track to Peny Boncyn Treifeilw use fence to locate) and on to Foel Cedig which took a little bit of searching to find the small cairn. | dickscroop | 03/11/2021 |
Cwm Hirnant road - Foel Goch - Trum y Gwragedd - Foel y Geifr - Pen y Boncyn Trefeilw - Stac Rhos - Cefn Gwyntog - Cefn Gwyntog N Top - Cefn Gwyntog Far N Top - Foel Cedig - Y Groes Fagl - Cwm Hirnant road. | Mark Jackson | 24/10/2021 |
With Sam in driving rain | simon and co | 23/10/2021 |
https://www.strava.com/activities/6146021730/overview | rhif7 | 21/10/2021 |
https://www.strava.com/activities/5914433314 | Sleepwa1ker | 03/09/2021 |
From Foel Cedig. Summit is a bit messy! | ger | 02/07/2021 |
Circular 13.7 mile route of serious heather bashing from Aber-Hirnant Picnic area. 
Foel Goch, Trum y Gwregedd, Foel y Geifr, Pen Cerrig Duon Pen y Boncyn Trefeilw, Stac Rhos, Foel Cedig, Bwlch y Groes-fagl and Foel-y-ddinas. 
The intial very steep ascent to Foel Goch from the road should not be underestimated! | Gwastadros | 12/06/2021 |
Rain, rain, rain! A walk out along the track, picking off tops on the way out and back. With B and R. | jenx | 17/12/2020 |
New GR | This Dog | 19/09/2020 |
The 7 listed high points from the head of Cwm Hirnant to Cyrniau Nod with Rufus. Parked at the top of the pass and used the vehicle track with brief heathery diversions to the high points. Returned along the track, 3 hours. | jacobrichmond | 07/09/2020 |
Parked by road and straight lined to Foel y Geifr. Due north to Foel Goch, descent to road back to car. Up and along track to Pen y Boncyn and the Devil's Mountain 666 (Foel Cedig) | andrew.morel | 11/08/2020 |
On the way to Foel Cedig. Extremely windy. | NormanW | 12/03/2020 |
Nuttall route 7.5 | Neil Midgley | 17/09/2019 |
Two day hillbagging and wildcamp trip from Hirnant pass. | Taz38 | 06/08/2019 |
from quarry hirnant then nutall route inc foel cedig and deleted nutalls and other minor tops back through penllyn forest 9 hrs | underhill | 24/05/2019 |
From Bala to Lake Vyrnwy Road SH94604 27326, via Pen y Cerrig Duon, Then onto Stac Rhos, Cefn Gwyntog north top, Cefn Gwyntog, Cyrniau Nod, Y Groes Fagl & Foel Credig. Return via mountain track. | Westdenewalker | 29/04/2019 |
On the return from Foel Cedig | Colin Crawford | 31/03/2019 |
Pen y cerrig duon, pen y boncyn trefeilw, stac rhos, Foel cedig, cryniau nod, Y groes fagl. Missed out Cefn Gwyntog, as the heather and soft ground was hard going. Bagged 4 Nutalls. | noxibis | 27/03/2019 |
followed path most of the was the heather was tough solo | colinfielding | 28/02/2019 |
From Pen y Cerrig Duon. On to Stac Rhos via easy grass slope. | Wycombe Wanderer | 24/11/2018 |
With SG from car parking at col to SW. | Smudge | 24/11/2018 |
Bagged after Foel Cedig and some of those strange Nuttall things. | Gill | 24/11/2018 |
Parked at the Hirnant Pass and took in in Pen y Boncyn Trefeilw and Foel Cedig,before returning to the car and climbing Foel y Geifr. | Sprog | 29/09/2018 |
Visited Pen y Boncyn Trefeilw while claiming Foel Cedig from Hirnant Pass as the new Marilyn in this area. 13km in 3 hours. | silveracorn_alan | 25/09/2018 |
Foel Cedig > Y Groes Fagl > Trum y Sarn > Cyrniau Nod > Cyrniau Nod South-East Top > Cyrniau Nod > Pen y Boncyn Trefeilw > Pen y Boncyn Trefeilw SW Top > Pen y Cerrig Duon from GR: SH 94614 27328 | ronaldo333 | 22/09/2018 |
Foel Cedig > Y Groes Fagl > Trum y Sarn > Cyrniau Nod > Cyrniau Nod South-East Top > Cyrniau Nod > Pen y Boncyn Trefeilw > Pen y Boncyn Trefeilw SW Top > Pen y Cerrig Duon from GR: SH 94614 27328 | Hippster | 22/09/2018 |
From Foel Cedig. Took the ridge track west and up to the flat summit area. Who knows which peat hag is the highest? Descended into Cwm Hirnant by deteriorated track down north ridge of Pen y Cerrig Duon. Solo. | Man of Kernow1 | 29/08/2018 |
Repeat | chalky1953 | 28/08/2018 |
From summit of Bala road: Pen y Boncyn Trefeilw / Stac Rhos / Y Groes Fagl / Cyrniau Nod / Cefn Gwyntog. Then: Foel y Geifr / Trum y Gwragedd / Foel Goch. 
Sunny. | Winterfloodian | 26/07/2018 |
From top of Hirnant pass | Dewi Prysor | 24/07/2018 |
Followed the Nuttall's route. Lovely sunny day with a nice cool breeze. | Herbert Anchovy | 23/06/2018 |
A selection of Berwyns in company of (for some) Lindsay. Tops I completed were Pen y Boncyn Trefeilw, Stac Rhos, Cefn Gwyntog, Foel Cedig and Y Groes Fagl. | knarf | 14/01/2018 |
Parked at start of track 946273. Weather: crystal clear, sharp frost and light wind - a complete contrast to the previous day when it was so windy I could hardly open the car door at the same spot! | MichaelF | 24/11/2017 |
With Val. Good weather. Parked at pass above Cwm Hirnant. Went to summit on the way back to the car after going to Cyrniau Nod. | mike.hoult | 08/08/2017 |
2/11 (Pen Y Cerrig Duon/Pen y Boncyn Trefeilw/Stac Rhos/Cyrniau Nod/Y Groes Fagl/Penllyn Forest Top/Foel y Geifir/Cefn Gwyntog North Top/Cefn Gwyntog/Garreg Wen/Rhwngy Ddwynant) | Fergalh | 17/06/2017 |
a round of mainly Nuttalls from The Hirmant Pass, 7.5, solo, on a blustery day | Lou | 11/06/2017 |
Walked the route in section 7.5 of the Nuttalls book. Foel Goch, Trum y Gwragedd, Foel y Geifr , Pen y Boncyn Trefeilw, Stac Rhos, Cefn Gwyntog, Cyrniau Nod, Y Groes Fagl. 
 
People call these the boring Berwyns but I don't agree. How many of the hundreds of thousands who climb Snowdon and Cader Idris each year would persevere with this walk. It's a real challenge and there are some good views if the weather holds. 
 
A very steep descent to Foel Goch reminded me how unfit I've become. Great views at the top, could see Arenig Fawr, Aran Fawddy and Snowdon in the distance inbetween the snow showers. The summit of Trum y Gwragedd was tantalisingly 40 foot on the other side of a barb wire fence. I decided not to be a purist but as I walked on the guilt gnawed at me and, 200 metres later at a corner post, I decided to leave my backpack, cross over and go back to the summit. My gloves and trousers already had holes in them and I'm not sure I'd have risked it if I had been wearing new exp | tsharp | 21/03/2017 |
with roger | Darren-443 | 18/02/2017 |
Solo walk during a weekend trip to Llangollen for a friend's Birthday. Aber Hirnant - Foel Cwm-Sian Llwyd - along ridge via all Nuttalls to Pen y Cerrig Duon - road - Foel y Geifr - north along ridge - steep descent by forest to road - road back to Aber Hirnant. A rather dull and heathery set of hills! | AGWilliamson | 18/12/2016 |