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Within a locale rich to overflowing in prehistoric delights... this inland promontory fort is not even shown on the map. Any good? Err, yeah.

GLADMAN Aug 14, 2026

Sites within 20km of Byrllysg, Y Rhinogydd

Dyffryn Ardudwy

Dolmen / Quoit / Cromlech • 1.35km SSW

70

1

2

10

2
Cors y Gedol settlement

Ancient Village / Settlement / Misc. Earthwork • 1.38km ESE

2
Bron y Foel Isaf

Burial Chamber • 1.39km ENE

21

5
Waun Hir

Ring Cairn • 1.4km E

19

3
Cors y Gedol

Burial Chamber • 1.53km ESE

39

1

1

4

3
Cors y Gedol Enclosure

Enclosure • 1.61km ESE

3

1
Tyddyn y Felin

Ancient Village / Settlement / Misc. Earthwork • 2.3km SSE

2

1
Craig y Dinas Cairnfield

Barrow / Cairn Cemetery • 2.52km E

18

2
Llecheiddior Cairns

Cairn(s) • 2.66km ESE

10
Llecheiddior

Stone Circle • 2.89km ESE

8

1
Llanbedr Church Stone

Carving • 2.96km NW

12

5
Craig y Dinas

Hillfort • 3.12km E

35

2
Llanbedr Stones

Standing Stones • 3.13km NW

26

1

6

1
Moelfre, Y Rhinogydd

Round Cairn • 3.13km ENE

22

1
Pont Scethin standing stones

Standing Stones • 3.21km E

20

1
Pont Scethin mounds

Artificial Mound • 3.29km E

1
Pen y Dinas (Dyffryn Ardudwy)

Hillfort • 3.38km SE

16

1
Pont Scethin, Double cairn

Cairn(s) • 3.4km E

5

1
Ffridd Newydd

Stone Circle • 3.5km ESE

9

1
Carneddau Hengwm

Cairn(s) • 4.03km SE

22

2

1
Egryn Abbey

Ancient Village / Settlement / Misc. Earthwork • 4.18km SE

2

1
Hengwm cairn circle

Cairn circle • 4.39km ESE

13

2
Gwern Einion stone

Standing Stone / Menhir • 4.5km NNW

3

3
Gwern Einion

Burial Chamber • 4.56km NNW

24

1

6

1
Llawlech

Cairn(s) • 4.59km E

8
Llanfair

Standing Stone / Menhir • 5.01km NNW

1
Bwlch y Rhiwgyr

Cairn(s) • 5.2km ESE

10
Mynydd Egryn

Cairn(s) • 5.4km ESE

14

1
Mynydd Llanaber

Ring Cairn • 6.14km SE

7

1

1
Cerrig y Cledd (north)

Carving • 6.38km ESE

7

1
Cerrig Arthur

Stone Circle • 6.4km ESE

38

1

2

1
Cerrig y Cledd

Standing Stone / Menhir • 6.5km ESE

8

2
Castell Llanaber

Hillfort • 6.57km SE

9

1

1
Bryn Castell

Hillfort • 6.66km E

18

2
Diffwys (Y Rhinogydd)

Cairn(s) • 6.71km E

13

1
Carreg (Llanfair)

Standing Stone / Menhir • 6.8km N

16

2
Harlech Circle

Cairn circle • 7.31km N

32

3

1
Moel-y-Sensigl

Standing Stone / Menhir • 7.32km N

20

3
Fonlief Hir Stone E

Standing Stone / Menhir • 7.54km N

9

1
Rhinog Fawr, Y Rhinogydd

Cairn(s) • 7.86km NE

15

2

2
Llyn Du, Y Rhinogydd

Cup and Ring Marks / Rock Art • 7.88km NE

4

2

1
Fonlief Hir Stone C

Standing Stone / Menhir • 8km N

20

2
Fonlief Hir Stone D

Standing Stone / Menhir • 8.02km N

16

2
Moel Goedog Stone 2

Standing Stone / Menhir • 8.16km N

14

1
Moel Goedog Stone 3

Standing Stone / Menhir • 8.16km N

6

2
Moel Goedog Stone 1

Standing Stone / Menhir • 8.29km N

12

1
Moel Goedog West

Cairn circle • 8.46km N

27

3
Moel Goedog East

Cairn circle • 8.47km N

18

2
Moel Goedog

Hillfort • 8.57km N

26

3
Dinas Oleu

Hillfort • 8.6km SE

10
Ffridd Fron, Y Rhinogydd

Kerbed Cairn • 9.03km NNE

13

1

1
Llyn Eiddew-Bach SW

Cairn(s) • 11.23km NNE

7

1
Pared-y-Cefn-Hir

Hillfort • 11.38km ESE

55

4
Llyn Eiddew-Bach

Stone Circle • 11.48km NNE

18

2
Moel y Geifr

Ancient Village / Settlement / Misc. Earthwork • 11.51km NNE

5

1
Llyn Eiddew-Bach NE

Cairn(s) • 11.52km NNE

5

1
Plas Cregennen Stone

Standing Stone / Menhir • 11.54km ESE

11

2
Arthog Standing Stones

Cairn circle • 11.67km SE

34

5
Cairn below Pared y Cefn hir

Cairn(s) • 11.67km ESE

5

1
Craig y Castell North

Hillfort • 11.83km E

14

1
Ffridd y Beudail

Standing Stone / Menhir • 11.91km ESE

6

2
Bron-llety-Ifan

Cup Marked Stone • 12.08km SE

17

2
Waen Bant

Standing Stone / Menhir • 12.2km SE

17

3
Carreg y Big (Arthog)

Standing Stone / Menhir • 12.22km ESE

26

1

3
Moel Ysgyfarnogod, Y Rhinogydd

Cairn(s) • 12.24km NNE

9

1

1
Bryn Cader Faner

Cairn circle • 12.36km NNE

81

1

1

9

2
Cairn with kerb

Kerbed Cairn • 12.53km ESE

30

2
Y Gyrn

Cairn(s) • 12.54km NNE

36

2
Hafotty-Fach Stones

Standing Stones • 12.55km ESE

10

2
Cairn, upon a woodland saddle

Round Cairn • 12.65km ESE

18

2
Hafotty-Fach Cairns

Cairn(s) • 12.66km ESE

41

1

5
Bryn Seward settlement

Ancient Village / Settlement / Misc. Earthwork • 12.67km SE

4
Bryn Seward Stones

Stone Row / Alignment • 12.68km SE

23

2
Cefn Coch, Y Rhinogydd

Round Cairn • 12.7km E

9

1

1
Maes y Caerau

Ancient Village / Settlement / Misc. Earthwork • 12.72km NNE

17

2
Cairn, S.W of Woodland saddle

Cairn(s) • 12.73km ESE

8

2
Cairn, W of Waen Fechen

Cairn(s) • 12.76km ESE

4

1
Goleuwern

Round Cairn • 12.77km SSE

4
Craig y Castell

Hillfort • 12.94km ESE

29

2
Waun Oer

Stone Row / Alignment • 13km SSE

23

3
Kenric’s Stone and Llanelltyd Church

Christianised Site • 13km E

3

1

4
Bedd y Brenin

Round Cairn • 13.18km SE

18

1

5
Cefn Clawdd Settlement, Y Rhinogydd

Ancient Village / Settlement / Misc. Earthwork • 13.3km NE

6

1

1
Craig Las Cairn

Cairn(s) • 13.31km ESE

2

1
Cairn, South of Ffridd Lwyd, Y Rhinogydd

Round Cairn • 13.39km NE

12

1

1
Pentre Farm

Round Barrow(s) • 13.53km E

3
Gwastadgoed cairns

Cairn(s) • 13.61km SSE

6
Carnedd Lwyd, Tyrrau Mawr (Cadair Idris)

Cairn(s) • 13.72km ESE

47

1

5
Gwastadgoed

Standing Stones • 13.8km SSE

14

2
Coed Dol-fawr

Promontory Fort • 13.87km E

1

1
Coed Pen-y-Bryn

Ancient Village / Settlement / Misc. Earthwork • 14km E
Cwm Moch

Cairn(s) • 14.06km NNE

5

1

1
Foel Faner

Hillfort • 14.21km E

24

2
Craig-y-Llyn (Cadair Idris)

Round Cairn • 14.23km SE

27

1

4
Maen Llwyd (Bronaber)

Standing Stone / Menhir • 14.26km NE

7

3
Pen-y-Stryda

Stone Circle • 14.83km ENE
Castell y Gaer (Llangelynin)

Hillfort • 15.09km SSE

20

1
Cist Cerrig

Burial Chamber • 15.15km NW

18

1

2
Llech Idris

Standing Stone / Menhir • 15.24km ENE

12

1

2
Llyn Gafr

Ancient Village / Settlement / Misc. Earthwork • 15.26km ESE

4

1
Moel y Gest

Hillfort • 15.45km NW

33

1
Coed Croes

Cairn(s) • 15.59km E

8

1

1
Foel Offrwm, Lower Settlement

Hillfort • 15.62km E

13

1
Foel Offrwm

Hillfort • 15.65km E

43

3
Caer-Dyni

Burial Chamber • 16.46km WNW

46

4

1
Criccieth

Hillfort • 16.58km WNW

8

1
Allt Lwyd

Cairn(s) • 16.6km SSE

24

2
Cae’r Mynach

Cairn(s) • 16.68km SSE

4

1
Llyn Cau

Natural Rock Feature • 16.79km ESE

6

1
Mynydd Moel, Cadair Idris

Cairn(s) • 16.9km ESE

17

1
Trefllys

Standing Stone / Menhir • 16.97km NW

2

3
Llyn Arran

Standing Stone / Menhir • 17.28km ESE

1
Fach-Goch

Standing Stone / Menhir • 17.38km NNW

10

3
Caerberllan Farm

Standing Stone / Menhir • 17.42km SE

10

3
Cwm Mawr

Ancient Village / Settlement / Misc. Earthwork • 17.77km NW

1
Cwm Mawr

Stone Circle • 17.78km NW

1
Maen Twrog

Standing Stone / Menhir • 17.85km NNE

12

1

4
Gau Graig, Cadair Idris

Enclosure • 17.92km E

16

1
Craig-yr-Aderyn

Hillfort • 17.96km SE

42

1

3

1
Craig yr Aderyn (Crag-top enclosure)

Ancient Village / Settlement / Misc. Earthwork • 18.13km SE

10
Moel Ednyfed (North)

Burnt Mound / Fulacht Fia • 18.25km WNW

3

1
Craig yr Aderyn cairn

Cairn(s) • 18.27km SE

16

1

1
Foel Llanfendigaid

Hillfort • 18.65km S

4

1

1
Tal-y-Llyn

18.66km ESE

6

1

3
Cefn Coch (Dolbenmaen)

Stone Circle • 19.18km NW
Waen Fach

Standing Stone / Menhir • 19.28km SSE

13

3
Ystumcegid

Dolmen / Quoit / Cromlech • 19.7km NW

35

1

4

2
Mynydd Pentre

Cairn(s) • 19.81km SE

7

2

Byrllysg, Y Rhinogydd

Articles

Sites within 20km of Byrllysg, Y Rhinogydd

Dyffryn Ardudwy

Cors y Gedol settlement

Bron y Foel Isaf

Waun Hir

Cors y Gedol

Cors y Gedol Enclosure

Tyddyn y Felin

Craig y Dinas Cairnfield

Llecheiddior Cairns

Llecheiddior

Llanbedr Church Stone

Craig y Dinas

Llanbedr Stones

Moelfre, Y Rhinogydd

Pont Scethin standing stones

Pont Scethin mounds

Pen y Dinas (Dyffryn Ardudwy)

Pont Scethin, Double cairn

Ffridd Newydd

Carneddau Hengwm

Egryn Abbey

Hengwm cairn circle

Gwern Einion stone

Gwern Einion

Llawlech

Llanfair

Bwlch y Rhiwgyr

Mynydd Egryn

Mynydd Llanaber

Cerrig y Cledd (north)

Cerrig Arthur

Cerrig y Cledd

Castell Llanaber

Bryn Castell

Diffwys (Y Rhinogydd)

Carreg (Llanfair)

Harlech Circle

Moel-y-Sensigl

Fonlief Hir Stone E

Rhinog Fawr, Y Rhinogydd

Llyn Du, Y Rhinogydd

Fonlief Hir Stone C

Fonlief Hir Stone D

Moel Goedog Stone 2

Moel Goedog Stone 3

Moel Goedog Stone 1

Moel Goedog West

Moel Goedog East

Moel Goedog

Dinas Oleu

Ffridd Fron, Y Rhinogydd

Llyn Eiddew-Bach SW

Pared-y-Cefn-Hir

Llyn Eiddew-Bach

Moel y Geifr

Llyn Eiddew-Bach NE

Plas Cregennen Stone

Arthog Standing Stones

Cairn below Pared y Cefn hir

Craig y Castell North

Ffridd y Beudail

Bron-llety-Ifan

Waen Bant

Carreg y Big (Arthog)

Moel Ysgyfarnogod, Y Rhinogydd

Bryn Cader Faner

Cairn with kerb

Y Gyrn

Hafotty-Fach Stones

Cairn, upon a woodland saddle

Hafotty-Fach Cairns

Bryn Seward settlement

Bryn Seward Stones

Cefn Coch, Y Rhinogydd

Maes y Caerau

Cairn, S.W of Woodland saddle

Cairn, W of Waen Fechen