Name Image Location Established Area Manager Aberbargoed Grasslands Caerphilly 51°41′10″N 3°12′40″W / 51.686°N 3.211°W / 51.686; -3.211 14 June 2012 42.28 hectares (104.5 acres) Caerphilly County Borough Council Allt Rhyd y Groes Carmarthenshire 52°07′05″N 3°48′43″W / 52.118°N 3.812°W / 52.118; -3.812 24 February 1983 69.71 hectares (172.3 acres) NRW Allt y Benglog Gwynedd 52°47′31″N 3°46′12″W / 52.792°N 3.770°W / 52.792; -3.770 26 April 1994 11.51 hectares (28.4 acres) NRW Berwyn Denbighshire , Gwynedd , Powys 52°49′55″N 3°29′56″W / 52.832°N 3.499°W / 52.832; -3.499 18 March 1999 7,919.76 hectares (19,570.2 acres) NRW Cadair Idris Gwynedd 52°41′38″N 3°53′46″W / 52.694°N 3.896°W / 52.694; -3.896 6 January 1983 436.76 hectares (1,079.3 acres) NRW Carmel Carmarthenshire 51°49′37″N 4°02′28″W / 51.827°N 4.041°W / 51.827; -4.041 24 July 1999 85.19 hectares (210.5 acres) NRW Ceunant Cynfal Gwynedd 52°57′04″N 3°55′37″W / 52.951°N 3.927°W / 52.951; -3.927 26 April 1994 2.73 hectares (6.7 acres) NRW Ceunant Llennyrch Gwynedd 52°55′23″N 3°59′20″W / 52.923°N 3.989°W / 52.923; -3.989 19 March 2018 329.24 hectares (813.6 acres) NRW Claerwen Ceredigion , Powys 52°18′18″N 3°43′01″W / 52.305°N 3.717°W / 52.305; -3.717 21 July 1994 793.40 hectares (1,960.5 acres) NRW Coed Camlyn Gwynedd 52°56′17″N 3°59′35″W / 52.938°N 3.993°W / 52.938; -3.993 3 June 1969 63.57 hectares (157.1 acres) NRW Coed Cymerau Gwynedd 52°57′58″N 3°57′18″W / 52.966°N 3.955°W / 52.966; -3.955 29 August 1992 26.30 hectares (65.0 acres) NRW Coed Dolgarrog Conwy 53°10′59″N 3°50′46″W / 53.183°N 3.846°W / 53.183; -3.846 20 April 1959 67.37 hectares (166.5 acres) NRW Coed Ganllwyd Gwynedd 52°48′00″N 3°53′42″W / 52.800°N 3.895°W / 52.800; -3.895 2 April 1963 23.57 hectares (58.2 acres) National Trust Coed Gorswen Conwy 53°13′12″N 3°51′58″W / 53.220°N 3.866°W / 53.220; -3.866 20 April 1959 13.57 hectares (33.5 acres) NRW Coed Rheidol Ceredigion 52°23′10″N 3°52′16″W / 52.386°N 3.871°W / 52.386; -3.871 7 February 1994 165.91 hectares (410.0 acres) NRW Coed Tremadog Gwynedd 52°56′24″N 4°08′31″W / 52.940°N 4.142°W / 52.940; -4.142 18 April 1958 2.64 hectares (6.5 acres) NRW Coed y Cerrig Monmouthshire 51°53′02″N 3°01′44″W / 51.884°N 3.029°W / 51.884; -3.029 12 February 1988 10.38 hectares (25.6 acres) NRW Coed y Rhygen Gwynedd 52°54′50″N 3°57′54″W / 52.914°N 3.965°W / 52.914; -3.965 3 June 1969 27.78 hectares (68.6 acres) NRW Coedmor Ceredigion , Pembrokeshire 52°03′47″N 4°37′59″W / 52.063°N 4.633°W / 52.063; -4.633 5 July 1991 46.12 hectares (114.0 acres) NRW Coedydd Aber Gwynedd 53°13′05″N 4°00′07″W / 53.218°N 4.002°W / 53.218; -4.002 4 March 1982 166.46 hectares (411.3 acres) NRW Coedydd Maentwrog Gwynedd 52°57′18″N 3°58′59″W / 52.955°N 3.983°W / 52.955; -3.983 26 April 1966 68.32 hectares (168.8 acres) NRW Cors Bodeilio Anglesey 53°16′19″N 4°14′53″W / 53.272°N 4.248°W / 53.272; -4.248 22 Mawrth 2013 41.53 hectares (102.6 acres) NRW Cors Caron Ceredigion 52°15′18″N 3°55′19″W / 52.255°N 3.922°W / 52.255; -3.922 22 January 1981 839.75 hectares (2,075.1 acres) NRW Cors Erddreiniog Anglesey 53°18′43″N 4°17′49″W / 53.312°N 4.297°W / 53.312; -4.297 22 March 2013 250.26 hectares (618.4 acres) NRW Cors Geirch Gwynedd 52°54′14″N 4°30′54″W / 52.904°N 4.515°W / 52.904; -4.515 22 March 2013 122.49 hectares (302.7 acres) NRW Cors Goch Anglesey 53°18′22″N 4°15′22″W / 53.306°N 4.256°W / 53.306; -4.256 15 June 1995 52.72 hectares (130.3 acres) North Wales Wildlife Trust Cors Goch Llanllwch Carmarthenshire 51°50′31″N 4°22′26″W / 51.842°N 4.374°W / 51.842; -4.374 23 July 1996 18.42 hectares (45.5 acres) Wildlife Trust South and West Wales Cors Gyfelog Gwynedd 53°00′25″N 4°17′49″W / 53.007°N 4.297°W / 53.007; -4.297 22 March 2013 36.97 hectares (91.4 acres) NRW Cors y Llyn Powys 52°11′13″N 3°26′28″W / 52.187°N 3.441°W / 52.187; -3.441 27 February 1987 25.12 hectares (62.1 acres) NRW Corsydd Llangloffan Pembrokeshire 51°56′42″N 5°03′00″W / 51.945°N 5.050°W / 51.945; -5.050 5 July 1991 38.93 hectares (96.2 acres) NRW Craig Cerrig Gleisiad a Fan Frynych Powys 51°53′28″N 3°31′05″W / 51.891°N 3.518°W / 51.891; -3.518 1 November 2002 488.38 hectares (1,206.8 acres) NRW Craig y Cilau Powys 51°50′10″N 3°10′41″W / 51.836°N 3.178°W / 51.836; -3.178 23 September 1959 64.82 hectares (160.2 acres) NRW Crymlyn Bog & Pant y Sais Neath Port Talbot , Swansea 51°37′59″N 3°52′59″W / 51.633°N 3.883°W / 51.633; -3.883 27 September 1991 130.83 hectares (323.3 acres) NRW Cwm Cadlan Rhondda Cynon Taf 51°46′26″N 3°30′32″W / 51.774°N 3.509°W / 51.774; -3.509 3 March 2006 32.93 hectares (81.4 acres) NRW Cwm Clydach Blaenau Gwent , Monmouthshire 51°48′18″N 3°08′06″W / 51.805°N 3.135°W / 51.805; -3.135 3 February 2012 30.65 hectares (75.7 acres) NRW Cwm Glas Crafnant Conwy 53°07′12″N 3°53′31″W / 53.120°N 3.892°W / 53.120; -3.892 19 July 1960 15.02 hectares (37.1 acres) NRW Cwm Idwal Conwy , Gwynedd 53°06′40″N 4°01′48″W / 53.111°N 4.030°W / 53.111; -4.030 24 November 1954 403.30 hectares (996.6 acres) NRW Dan yr Ogof Powys 51°49′48″N 3°41′17″W / 51.830°N 3.688°W / 51.830; -3.688 2 April 2004 0.52 hectares (1.3 acres) The National Showcaves Centre Dinefwr Park Carmarthenshire 51°52′44″N 4°00′58″W / 51.879°N 4.016°W / 51.879; -4.016 13 July 2007 224.53 hectares (554.8 acres) National Trust Dyfi Ceredigion , Gwynedd 52°31′44″N 4°00′54″W / 52.529°N 4.015°W / 52.529; -4.015 24 November 1992 2,290.36 hectares (5,659.6 acres) NRW Fenn's, Whixall & Bettisfield Mosses Wrexham , Shropshire 52°55′37″N 2°45′43″W / 52.927°N 2.762°W / 52.927; -2.762 1 May 2021 583.94 hectares (1,442.9 acres) Natural England Fiddlers Elbow Monmouthshire 51°49′16″N 2°41′10″W / 51.821°N 2.686°W / 51.821; -2.686 15 November 2017 28.34 hectares (70.0 acres) Woodland Trust Gower Coast Swansea 51°33′32″N 4°16′52″W / 51.559°N 4.281°W / 51.559; -4.281 6 February 2002 92.17 hectares (227.8 acres) National Trust Grassholm Island Pembrokeshire 51°43′52″N 5°28′44″W / 51.731°N 5.479°W / 51.731; -5.479 23 July 1996 10.77 hectares (26.6 acres) RSPB Gregynog Powys 52°33′58″N 3°21′07″W / 52.566°N 3.352°W / 52.566; -3.352 6 March 2013 214.17 hectares (529.2 acres) University of Wales Hafod Elwy Moor Denbighshire 53°05′38″N 3°34′19″W / 53.094°N 3.572°W / 53.094; -3.572 5 October 1999 82.96 hectares (205.0 acres) NRW Hafod Garregog Gwynedd 52°58′41″N 4°05′02″W / 52.978°N 4.084°W / 52.978; -4.084 15 April 1987 86.70 hectares (214.2 acres) National Trust Kenfig Pool and Dunes Bridgend , Neath Port Talbot 51°31′23″N 3°44′31″W / 51.523°N 3.742°W / 51.523; -3.742 23 May 1989 513.72 hectares (1,269.4 acres) NRW Lady Park Wood (EN) Gloucestershire , Monmouthshire 51°49′37″N 2°39′29″W / 51.827°N 2.658°W / 51.827; -2.658 21 November 1985 37.86 hectares (93.6 acres) Forestry Commission (England) Llyn Eiddwen Ceredigion 52°16′55″N 4°02′38″W / 52.282°N 4.044°W / 52.282; -4.044 23 July 1996 11.53 hectares (28.5 acres) Wildlife Trust South and West Wales Maes-y-Facrell, Pen y Gogarth Conwy 53°19′41″N 3°50′46″W / 53.328°N 3.846°W / 53.328; -3.846 26 February 2009 5.22 hectares (12.9 acres) NRW Merthyr Mawr Warren Bridgend 51°28′48″N 3°38′24″W / 51.480°N 3.640°W / 51.480; -3.640 3 July 2002 324.23 hectares (801.2 acres) NRW Morfa Dyffryn Gwynedd 52°47′56″N 4°08′06″W / 52.799°N 4.135°W / 52.799; -4.135 18 January 1962 197.37 hectares (487.7 acres) NRW Morfa Harlech Gwynedd 52°53′53″N 4°07′19″W / 52.898°N 4.122°W / 52.898; -4.122 9 October 1981 880.73 hectares (2,176.3 acres) NRW Nant Irfon Powys 52°10′23″N 3°41′49″W / 52.173°N 3.697°W / 52.173; -3.697 8 December 1983 137.57 hectares (339.9 acres) NRW Newborough Warren & Ynys Llanddwyn Anglesey 53°09′07″N 4°22′23″W / 53.152°N 4.373°W / 53.152; -4.373 2 December 1992 1,556.43 hectares (3,846.0 acres) NRW Newport Wetlands Newport 51°32′13″N 2°56′28″W / 51.537°N 2.941°W / 51.537; -2.941 16 April 2008 865.72 hectares (2,139.2 acres) NRW Ogof Ffynnon Ddu Powys 51°49′34″N 3°38′35″W / 51.826°N 3.643°W / 51.826; -3.643 1 Mawrh 1993 417.97 hectares (1,032.8 acres) NRW Oxwich Swansea 51°33′58″N 4°09′14″W / 51.566°N 4.154°W / 51.566; -4.154 15 November 2017 228.49 hectares (564.6 acres) NRW Pengelli Forest Pembrokeshire 52°01′08″N 4°43′34″W / 52.019°N 4.726°W / 52.019; -4.726 27 July 1995 65.94 hectares (162.9 acres) Wildlife Trust South and West Wales Penhow Woodlands Monmouthshire , Newport 51°36′25″N 2°50′20″W / 51.607°N 2.839°W / 51.607; -2.839 15 November 1984 24.04 hectares (59.4 acres) NRW Ramsey Pembrokeshire 51°51′54″N 5°20′24″W / 51.865°N 5.340°W / 51.865; -5.340 23 July 1996 281.56 hectares (695.7 acres) RSPB Rhinog Gwynedd 52°50′24″N 3°59′06″W / 52.840°N 3.985°W / 52.840; -3.985 1 December 1970 592.39 hectares (1,463.8 acres) NRW Rhos Goch Powys 52°07′37″N 3°10′30″W / 52.127°N 3.175°W / 52.127; -3.175 27 February 1987 45.21 hectares (111.7 acres) NRW Rhos Llawr Cwrt Ceredigion 52°07′19″N 4°19′08″W / 52.122°N 4.319°W / 52.122; -4.319 24 November 1992 58.73 hectares (145.1 acres) NRW Roundton Hill Powys 52°32′49″N 3°02′31″W / 52.547°N 3.042°W / 52.547; -3.042 31 May 2000 33.45 hectares (82.7 acres) Montgomeryshire Wildlife Trust Skokholm Pembrokeshire 51°41′49″N 5°16′37″W / 51.697°N 5.277°W / 51.697; -5.277 6 December 2008 98.49 hectares (243.4 acres) Wildlife Trust South and West Wales Skomer Pembrokeshire 51°44′10″N 5°17′35″W / 51.736°N 5.293°W / 51.736; -5.293 2 April 1963 306.56 hectares (757.5 acres) Wildlife Trust South and West Wales Stackpole Pembrokeshire 51°36′54″N 4°54′58″W / 51.615°N 4.916°W / 51.615; -4.916 8 March 1995 232.79 hectares (575.2 acres) NRW and National Trust Stanner Rocks Powys 52°13′08″N 3°04′44″W / 52.219°N 3.079°W / 52.219; -3.079 18 February 1981 5.42 hectares (13.4 acres) NRW Tŷ Canol Pembrokeshire 51°59′49″N 4°46′44″W / 51.997°N 4.779°W / 51.997; -4.779 22 September 1986 70.11 hectares (173.2 acres) NRW Waun Las Carmarthenshire 51°50′31″N 4°08′13″W / 51.842°N 4.137°W / 51.842; -4.137 7 August 2008 150.14 hectares (371.0 acres) National Botanic Garden of Wales Whiteford Swansea 51°38′02″N 4°14′35″W / 51.634°N 4.243°W / 51.634; -4.243 26 April 1966 806.05 hectares (1,991.8 acres) NRW and National Trust Ynys Enlli Gwynedd 52°45′32″N 4°47′24″W / 52.759°N 4.790°W / 52.759; -4.790 24 March 1986 178.64 hectares (441.4 acres) Bardsey Island Trust Yr Eifl Gwynedd 52°58′08″N 4°25′52″W / 52.969°N 4.431°W / 52.969; -4.431 22 March 2013 39.25 hectares (97.0 acres) NRW Yr Wyddfa Gwynedd 53°03′29″N 4°02′56″W / 53.058°N 4.049°W / 53.058; -4.049 26 April 1966 1,671.76 hectares (4,131.0 acres) NRW