Cefn Gwyntog
614m (2015ft)
Cefn Gwyntog is in The Berwyns, Powys, Wales
*Cefn Gwyntog is actually just outside of The National Park Boundary
You can walk to the top of Cefn Gwyntog by using either of these 2 route maps:
Walk gw145 Pen y Boncyn Trefeilw and Foel Cedig from Hirnant Pass
The fabulous Berwyns
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Vital Statistics:
| Length: | 10.5ml (17km) |
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| Ascent: | 2,081ft (634m) |
| Time: | 6 hrs |
| Grade: |  (Moderate) |
Route Summary:
Hirnant Pass - Pen y Cerrig - Pen y Boncyn Trefeilw - Stac Rhos - Cefn Gwyntog - Foel Cedig - Cyrniau Nod - Y Groes Fagl - Pennllyn Forest - Ystrad-y-groes - Hirnant Pass
Walk gw120 The Western Berwyns from Hirnant Pass
The fabulous Berwyns
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Vital Statistics:
| Length: | 12.75ml (20.5km) |
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| Ascent: | 2,763ft (842m) |
| Time: | 7½ hrs |
| Grade: |  (Hard) |
Route Summary:
Hirnant Pass - Foel Goch (Berwyns) - Trum y Gwrgedd - Trum y Gwragedd - Foel y Geifr (Berwyns) - Pen y Cerrig Duon - Pen y Boncyn Trefeilw - Stac Rhos - Cefn Gwyntog - Foel Cedig - Cyrniau Nod - Y Groes Fagl - Pennllyn Forest - Ystrad-y-groes - Hirnant Pass
Interactive Walking Maps
See Cefn Gwyntog and the surrounding tops on our unique, downloadable, PDF Peak Bagging Map:
NB: Whether you print off a copy or download it to your phone, this PDF Peak Baggers' Map might prove incredibly useful when your are up there on the tops and you cannot get a phone signal.
See Cefn Gwyntog and the surrounding tops on our free-to-access 'Google Style' Peak Bagging Map:
The Berwyns of Snowdonia National Park
Less data - quicker to download
You can find Cefn Gwyntog & all the walks that climb it on these unique free-to-access Interactive Walk Planning Maps:
1:25,000 scale OS Explorer Maps (orange/yellow covers):
An Interactive Walk Planning Map for OS Explorer 239 Lake Vyrnwy & Llanfyllin is not currently available
1:50,000 scale OS Landranger Map (pink/magenta covers):
Fellow go4awalkers who have already walked, climbed, scaled, summited, hiked & bagged Cefn Gwyntog
Melfyn Parry walked up Cefn Gwyntog on July 8th, 2026 [from/via/route] Followed the directions on walk GW120. The route up to Foel Goch was the hardest section, the first section is very steep involving some bracken areas, heather & bilberry bushes. Once on the faint path near the summit the going gets a lot easier. The path to the next summit of Trum y Gwragedd could easily be seen & progress was good, similarly the path to Foel y Geifr was straightforward. From here you descend to the Hirnant Pass which can be easily seen below, if you turn back along the route before dropping down you can avoid the heather & keep to grassy slopes. The second part of the walk is mainly on a forest track with forays off it to get to each summit, the first being Pen y Boncyn Trefeilw. The next peak Stac Rhos was not the easiest to find due to there being several little mounds of similar height, but it is in fact the first one on the right as you approach. From here go diagonally across to the mound on the left & cross over the fence at a boundary stone & follow the fence (left) down through a slightly boggy area. You will see another boundary stone tucked by the fence higher up but don't turn right here, go on a little further until you see a gate on your left & here turn to follow a faint path towards Cefn Gwyntog. There is an area about half way which is full of deep bog pools, no path, this is trial & error but does meet the faint path on the other side to take you to the summit. From the summit you have to retrace your steps back to the gate (mentioned earlier), go over the gate & continue back to the forest track. From here it is straightforward to Foel Cedig & finally Y Groes Fagl. From here you descend to the same track that enters the forest & continues back down to the car park. [with] Solo walk [weather] Dry & very warm day with some welcome breezes. - A quiet day in the hills, only saw 1 walker all day.
Christina Lander climbed it on July 30th, 2024 [from/via/route] Parking area next to the bridge by Foel y Ddinas on the Hirnant Pass - up the grassy ridge to Pen Cerrig Duon - Pen y Boncyn Trefeilw - Stac Rhos - Cefn Gwntog - Foel Cedig - Cyrniau Nod - Y Groes Fagl - through Penllyn Forest back to start [with] Dick [weather] A beautiful, hot sunny day - During our holiday staying at Y Gilfach, Bryn Melyn, Llandderfel
Stephanie Doyle bagged it on April 15th, 2023 [with] Friend [weather] Beautiful - Boggy, Heather, exposed but worth it
Mark Davidson hiked Cefn Gwyntog on July 3rd, 2006 [from/via/route] Walk gw120 The Western Berwyns from Hirnant Pass [with] Alone [weather] Nice & sunny
David Lane summited on December 2nd, 2006 [with] Kelly
Richard Penney has walked, climbed & bagged Cefn Gwyntog.
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Photographs & Pictures of views from, on, or of, Cefn Gwyntog
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