Foel Cwm-Sian Llwyd
648m (2127ft)
The Berwyns, Snowdonia, Gwynedd, Wales
The summit of Foel Cwm-Sian Llwyd is marked by an Ordnance Survey Trig Point.
Not familiar with this top?
You can walk/hike to the top of Foel Cwm-Sian Llwyd by using either of these 2 easy‑to‑follow route maps:
Walk dn128 Foel Cwm-Sian Llwyd from Cwm Sian Llwyd
Wild heathery top with fine views of Snowdonia
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Vital Statistics:
| Length: | 4.75ml (7.5km) |
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| Ascent: | 916ft (279m) |
| Time: | 2.75hrs |
| Grade: |  (Easy) |
Route Summary:
Cwm Sian Llwyd - Foel Cwm-Sian Llwyd - Trwyn Swch - Nant Llwyn-gwerh - Nant Ceunant-bach - Milltir Gerrig - Pont Cwm Pydew - Nant Cwm Pydew - Cwm Sian Llwyd
Walk dn106 Foel Cwm-Sian Llwyd from Cwm Pennant
Wild heathery top with fine views of Snowdonia
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Vital Statistics:
| Length: | 7.75ml (12.5km) |
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| Ascent: | 1,661ft (506m) |
| Time: | 4½ hrs |
| Grade: |  (Moderate) |
Route Summary:
Cwm Pennant - Ffridd Ddu - Bryniau Gleision - Cwm Sian Llwyd - Foel Cwm-Sian Llwyd - Trwyn Swch - Nant Llwyn-gwerh - Nant Ceunant-bach - Milltir Gerrig - Nant Cwm Pydew - Blaen-y-cwm - Cwm Pennant
See Foel Cwm-Sian Llwyd and the surrounding tops on our free-to-access 'Google Style' Peak Bagging Maps:
The Berwyns of Snowdonia National Park
Less data - quicker to download
The Whole of Snowdonia National Park
More data - might take a little longer to download
See Foel Cwm-Sian Llwyd 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.
You can find Foel Cwm-Sian Llwyd & all the walks that climb it on these unique free-to-access Interactive Walk Planning Maps:
1:25,000 scale OS Explorer Map (orange/yellow covers):
1:50,000 scale OS Landranger Map (pink/magenta covers):
Fellow go4awalkers who have already walked, climbed, scaled, summited, hiked & bagged Foel Cwm-Sian Llwyd
Melfyn Parry walked up Foel Cwm-Sian Llwyd on April 25th, 2025 [from/via/route] Started walk from parking area off B4391 at grid reference SJ006321 Start of walk is okay as leads up a track as wide as a quad bike but soon disappears & the going gets tough. Just heather bushes, sometimes two feet high, made progress very slow. A little easier towards the top but not a pleasant ascent. Tried to find a better path down with no success. Some narrow paths, sheep trods & often no path at all. A two mile walk that took 2 hours. Won't be doing this one again. [with] On my own [weather] It was breezy & cool at times, at least it didn't rain. - Excellent views in all directions from the top. No one else on this hill, not surprised given the terrain & how difficult the walking is on this hill.
Christina Lander climbed it on July 27th, 2024 [from/via/route] Followed Nant Ceunant-bach to begin, from a lay-by on B4391 to the trig point, & returned the same way [with] Dick [weather] A beautiful warm evening on the first day of the holiday - During our holiday staying at Y Gilfach, Bryn Melyn, Llandderfel
Adrian Haywood bagged it on March 18th, 2023 [from/via/route] From the road, no path, all through gorse. [with] Rob, Huw, Tom, Mike, Darryl and Arwel
Mark Davidson hiked Foel Cwm-Sian Llwyd on August 2nd, 2007 [with] Alone [weather] Nice & sunny
Donovan Suddell summited on April 2nd, 2022 [with] wife and grandson (not that they made it to the top) [weather] lights snow & cloudy - Got Lost
Stephanie Doyle conquered it on September 3rd, 2021 [with] Solo [weather] Foggy - Heather, Heather, Heather!!
Paul Booth, Trevor Williams and Richard Penney have all walked, climbed & bagged Foel Cwm-Sian Llwyd.
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Send us your photographs and pictures on, of, or from Foel Cwm-Sian Llwyd
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