{"id":6086,"date":"2021-11-16T11:46:05","date_gmt":"2021-11-16T11:46:05","guid":{"rendered":"https:\/\/www.outdoorcardiff.com\/?page_id=6086"},"modified":"2026-03-09T10:32:50","modified_gmt":"2026-03-09T10:32:50","slug":"parc-cefn-onn","status":"publish","type":"page","link":"https:\/\/www.outdoorcardiff.com\/cy\/parciau\/parc-cefn-onn\/","title":{"rendered":"Parc Cefn Onn"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row top_padding=&#8221;20&#8243; bottom_padding=&#8221;20&#8243;][vc_column width=&#8221;1\/2&#8243;][vc_column_text]<\/p>\n<h2>Yngl\u0177n \u00e2 Parc Cefn Onn<\/h2>\n<p>Mae\u2019r parc hanesyddol gradd 2 hwn, sydd ar ymylon gogleddol Caerdydd hefyd yn barc gwledig sy\u2019n rhoi mynediad at rwydwaith llwybrau troed Mynydd Caerffili. Mae\u2019n cynnwys casgliad hynod o goed cynhenid ac egsotig mewn dyffryn clos. Caiff ymwelwyr fwynhau\u2019r golygfeydd trawiadol a\u2019r awyrgylch braf, llonydd.<\/p>\n<p>Yn wreiddiol gosodwyd rhan uchaf y parc tua chanrif yn \u00f4l, gan y perchennog, Ernest Prosser, Cyfarwyddwr Rheilffordd Cwm Rhymni oedd gerllaw. Mae ei nentydd a llwybrau troellog yn dilyn y cwm ysgafn lle llifa\u2019r Nant Fawr.<\/p>\n<p>Mae\u2019r nentydd, pyllau, coetir a phlanhigion eraill yn gwneud hon yn noddfa ar gyfer bywyd gwyllt. Mae ymwelwyr yn dychwelyd yn rheolaidd i fwynhau\u2019r parc mewn gwahanol dymhorau.<\/p>\n<p>[\/vc_column_text][\/vc_column][vc_column el_class=&#8221;visitorbox&#8221; bg_color=&#8221;#054aa4&#8243; width=&#8221;1\/2&#8243;][vc_column_text el_class=&#8221;visitor&#8221;]<\/p>\n<h2><i class=\"fa fa-clock-o\" aria-hidden=\"true\"><\/i> Gwybodaeth i ymwelwyr<\/h2>\n<p>Mae\u2019r parc ar agor o 7am tan 30 munud cyn y machlud.<\/p>\n<p>Parcio ar gael ar y safle.<\/p>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row top_padding=&#8221;45&#8243; bottom_padding=&#8221;35&#8243;][vc_column width=&#8221;1\/1&#8243;][vc_column_text]<\/p>\n<h2><i class=\"fa fa-info-circle\"><\/i> Nodweddion<\/h2>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row bottom_padding=&#8221;35&#8243;][vc_column animation=&#8221;fade-in-from-left&#8221; width=&#8221;1\/2&#8243;]<div class=\"single_image wpb_content_element align-center    \" data-animation=\"none\" data-delay=\"0\"><img loading=\"lazy\" decoding=\"async\" width=\"950\" height=\"713\" src=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-8.jpg\" class=\"attachment-large\" alt=\"\" title=\"Parc Cefn Onn (8)\" srcset=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-8.jpg 950w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-8-300x225.jpg 300w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-8-768x576.jpg 768w\" sizes=\"auto, (max-width: 950px) 100vw, 950px\" \/><\/div>[\/vc_column][vc_column width=&#8221;1\/2&#8243;]<div class=\"minti_list wpb_content_element color-accent circlearrow\" style=\"\">\n<ul>\n<li><strong>Parc hanesyddol rhestredig Gradd 2: <\/strong>Mae\u2019r parc ar Gofrestr Cadw o Dirluniau, Parciau a Gerddi o Ddiddordeb Hanesyddol Arbennig yng Nghymru<b>.<\/b><\/li>\n<li><strong>Gardd Goetir: <\/strong>gosodwyd ar \u00f4l 1944 yn rhan ddeheuol y safle<\/li>\n<li><strong>Y Dingle: <\/strong>yr ardd hanesyddol a osodwyd gan Ernest Prosser; Mae\u2019r rhan hon yn cynnwys casgliad o blanhigion prin ac egsotig (ar gau i\u2019r cyhoedd am 4 mis o 4 Chwefror 2019).<\/li>\n<li><strong>T\u0177 haf a\u2019r hen bwll nofio: <\/strong>Mae\u2019r pwll a\u2019r t\u0177 haf yn nodweddion cynnar y Dingle, a godwyd i leddfu symptomau\u2019r dici\u00e2u a oedd ar fab Prosser, Cecil.<\/li>\n<li><strong>Coed Transh yr Hebog: <\/strong>coetir Derw a Bedw hanner naturiol tua\u2019r gogledd o\u2019r tir parc mwy ffurfiol yn agos at gopa mynydd Caerffili.<\/li>\n<li><strong>Murlun celf: <\/strong>yn y danffordd ym mynediad y parc, yn adrodd hanes y parc.<\/li>\n<li><strong>Arddangosiadau\u2019r gwanwyn:<\/strong> mae\u2019r parc yn werth ei weld trwy\u2019r gwanwyn a\u2019r lloriau blodeuog o fylbiau\u2019r gwanwyn a\u2019r camelia, y rhododendron a\u2019r asalea.<\/li>\n<li><strong>Lliwiau\u2019r hydref: <\/strong>mae\u2019r casgliad o goed a\u2019r llwyni\u2019n cynnig arddangosiad cyfoethog a lliwgar yn yr hydref.<\/li>\n<\/ul>\n<\/div>[\/vc_column][\/vc_row][vc_row top_padding=&#8221;45&#8243; bottom_padding=&#8221;35&#8243;][vc_column width=&#8221;1\/1&#8243;][vc_column_text]<\/p>\n<h2><i class=\"fa fa-info-circle\" aria-hidden=\"true\"><\/i> Cyfleusterau<\/h2>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row bottom_padding=&#8221;35&#8243;][vc_column animation=&#8221;fade-in-from-left&#8221; width=&#8221;1\/1&#8243;]<div class=\"minti_list wpb_content_element color-accent checkbox\" style=\"\">\n<ul>\n<li><a href=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Cefn-Onn-Country-Park-Wildlife-Explorer-Trail.pdf\">Llwybr Fforio Bywyd Gwyllt:<\/a> i blant &#8211; (lawrlwythwch daflen)<\/li>\n<li><a href=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/12-Activities-for-Children-in-Parc-Cefn-Onn.pdf\">12 O Weithgareddau I Blant Ym Mharc Cefn Onn <\/a>(lawrlwythwch daflen)<\/li>\n<li><strong>Llwybrau wedi eu marcio: <\/strong>trwy\u2019r parc, yn cysylltu \u00e2 llwybrau cerdded yn y wlad o\u2019i gwmpas.<\/li>\n<li><strong>Cysylltiadau llwybrau troed:<\/strong> i lwybr cerdded Cefnffordd Caerffili<\/li>\n<li><strong>Cyfleoedd Gwirfoddoli: <\/strong>Mae\u2019r Gwasanaeth Wardeiniaid Parc Cymunedol yn trefnu dyddiau gwaith a gweithgareddau eraill yn y parc mewn cydweithrediad \u00e2 <a href=\"http:\/\/www.friendsofcefnonn.org.uk\/wp\/\">Chyfeillion Cefn Onn <\/a>.<\/li>\n<\/ul>\n<\/div>[\/vc_column][\/vc_row][vc_row bottom_padding=&#8221;35&#8243;][vc_column animation=&#8221;fade-in-from-left&#8221; width=&#8221;1\/1&#8243;][vc_column_text]<\/p>\n<h2><strong>Llogi sgwteri Tramper ym Mharc Cefn Onn <\/strong><\/h2>\n<p>Gyda chefnogaeth Cronfa Treftadaeth y Loteri, rydyn ni wedi ymuno \u00e2 <a href=\"https:\/\/countrysidemobility.org\/\">Countryside Mobility<\/a>, i ddarparu dau sgwter symudedd sy&#8217;n addas ar gyfer pob math o dir i\u2019w llogi. Mae&#8217;r rhain ar gael un diwrnod yr wythnos ar ddyddiadau penodol.<\/p>\n<p>Maen nhw\u2019n ddiogel ac yn hawdd eu defnyddio, hyd yn oed os nad ydych\u00a0 wedi gorfod defnyddio sgwter o&#8217;r blaen.<\/p>\n<p>Gall archebion gael eu gwneud drwy e-bostio <a href=\"mailto:CeidwaidParciauCymunedol@caerdydd.gov.uk\">CeidwaidParciauCymunedol@caerdydd.gov.uk<\/a>. Dylech gynnwys eich manylion cyswllt a\u2019r amser, y dyddiad, a pha mor hir yr hoffech logi\u2019r Tramper<\/p>\n<p>Gall fod yn bosibl cael un heb archebu o flaen llaw, yn dibynnu ar argaeledd ar y dyddiadau llogi penodol.<\/p>\n<p>Gyda 2 lwybr ar gael drwy&#8217;r parc, gallwch gerdded o\u2019i gwmpas i gyd mewn awr. Os yw&#8217;n well gennych chi gyflymder mwy hamddenol, rydym yn argymell cymryd o leiaf 2 awr.<\/p>\n<p>I logi sgwter Tramper, bydd angen i chi ymaelodi gyda Countryside Mobility. Gellir defnyddio\u2019r aelodaeth ym mhob <a href=\"https:\/\/countrysidemobility.org\/locations\">lleoliad Countryside Mobility arall<\/a> hefyd.<\/p>\n<p>Dewisiadau aelodaeth:<\/p>\n<ul>\n<li>12 mis &#8211; \u00a315 (delfrydol ar gyfer ymweliadau mynych \u00e2&#8217;r parc a lleoliadau eraill Countryside Mobility).<\/li>\n<li>Pythefnos &#8211; \u00a35<\/li>\n<li>Defnydd untro &#8211; \u00a33<\/li>\n<\/ul>\n<p>Mae ffi llogi ychwanegol o \u00a32.50 yr awr &#8211; mae hyn yn helpu i dalu costau cynnal y gwasanaeth.\u00a0 Bydd taliadau cardiau yn cael eu cymryd wrth gyrraedd.<\/p>\n<p><span data-olk-copy-source=\"MessageBody\">Mae Trampers ar gael i\u2019w llogi ar y dyddiadau hyn:<\/span><\/p>\n<p>2026<\/p>\n<div class=\"AxqVh\">\n<div class=\"OPPzxe\">\n<div class=\"QcsUad BDJ8fb BLojaf sMVRZe hCXDsb wneUed\">\n<div class=\"usGWQd\">\n<div class=\"KkbLmb\">\n<div class=\"lRu31\" dir=\"ltr\">\n<div class=\"OvtS8d\">\n<p>Dydd Llun 9 Mawrth<\/p>\n<p>Dydd Mercher 18 Mawrth<\/p>\n<p>Dydd Sadwrn 28 Mawrth<\/p>\n<\/div>\n<div class=\"NQSJo\">\n<p class=\"x_MsoNormal\">Dydd Gwener 3 Ebrill<br \/>\nDydd Mercher 8 Ebrill<br \/>\nDydd Sul 19 Ebrill<br \/>\nDydd Lau 23 Ebrill<br \/>\nDydd Lau 30 Ebrill<br \/>\nDydd Sadwrn 9 Mai<br \/>\nDydd Gwener 15 Mai<br \/>\nDydd Sadwrn 23 Mai<br \/>\nDydd Sul 31 Mai<br \/>\nDydd Lau 4 Mehefin<br \/>\nDydd Lau 11 Mehefin<\/p>\n<p class=\"x_MsoNormal\">Dydd Sadwrn 20 Mehefin<\/p>\n<p class=\"x_MsoNormal\">Dydd Llun 22 Mehefin<\/p>\n<\/div>\n<\/div>\n<div class=\"UdTY9 WdefRb\" aria-hidden=\"true\" data-location=\"2\">\n<div class=\"kO6q6e\"><\/div>\n<\/div>\n<div class=\"XL3Kf XExWNc\">\n<div class=\"a8FIud X0rvP\">\n<div data-show-delay-ms=\"250\" data-append-to-body=\"false\" data-propagate-tooltip-mouseover-events=\"true\" data-anchor-corner=\"bottom-end\" data-enable-skip-handler=\"true\" data-popup-corner=\"top-end\">\n<div class=\" B2mKhd eQGGme xGUN1\">Dyddiadau eraill i&#8217;w cadarnhau<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>[\/vc_column_text][\/vc_column][vc_column][\/vc_column][\/vc_row][vc_row bottom_padding=&#8221;35&#8243;][vc_column animation=&#8221;fade-in-from-left&#8221; width=&#8221;1\/3&#8243;]<div class=\"single_image wpb_content_element align-center    \" data-animation=\"none\" data-delay=\"0\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot0-1024x576.jpg\" class=\"attachment-large\" alt=\"Person travelling through a forest using a tramper vehicle\" title=\"\" srcset=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot0-1024x576.jpg 1024w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot0-300x169.jpg 300w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot0-768x432.jpg 768w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot0-1536x864.jpg 1536w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot0-1000x563.jpg 1000w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot0.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div>[\/vc_column][vc_column width=&#8221;1\/3&#8243;]<div class=\"single_image wpb_content_element align-center    \" data-animation=\"none\" data-delay=\"0\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot1-1024x576.jpg\" class=\"attachment-large\" alt=\"Person going up steep hill in a tramper vehicle\" title=\"\" srcset=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot1-1024x576.jpg 1024w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot1-300x169.jpg 300w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot1-768x432.jpg 768w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot1-1536x864.jpg 1536w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot1-1000x563.jpg 1000w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot1.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div>[\/vc_column][vc_column width=&#8221;1\/3&#8243;]<div class=\"single_image wpb_content_element align-center    \" data-animation=\"none\" data-delay=\"0\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"961\" src=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot5-e1726736522926-1024x961.jpg\" class=\"attachment-large\" alt=\"Example showing what the tramper looks like\" title=\"\" srcset=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot5-e1726736522926-1024x961.jpg 1024w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot5-e1726736522926-300x282.jpg 300w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot5-e1726736522926-768x721.jpg 768w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/SnapShot5-e1726736522926.jpg 1063w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div>[\/vc_column][\/vc_row][vc_row bottom_padding=&#8221;35&#8243;][vc_column animation=&#8221;fade-in-from-left&#8221; width=&#8221;1\/3&#8243;]<div class=\"single_image wpb_content_element align-center    \" data-animation=\"none\" data-delay=\"0\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"174\" src=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/CM-logo-large-300x174.png\" class=\"attachment-medium\" alt=\"Countryside mobility logo\" title=\"CM logo large\" srcset=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/CM-logo-large-300x174.png 300w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/CM-logo-large-1024x592.png 1024w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/CM-logo-large-768x444.png 768w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/CM-logo-large-1536x889.png 1536w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/CM-logo-large.png 1732w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/div>[\/vc_column][vc_column width=&#8221;1\/3&#8243;]<div class=\"single_image wpb_content_element align-center    \" data-animation=\"none\" data-delay=\"0\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Welsh_Made_possible_logo_colour_JPEG-300x200.jpg\" class=\"attachment-medium\" alt=\"Lottery Heritage fund logo\" title=\"Welsh_Made_possible_logo_colour_JPEG\" srcset=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Welsh_Made_possible_logo_colour_JPEG-300x200.jpg 300w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Welsh_Made_possible_logo_colour_JPEG-1024x681.jpg 1024w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Welsh_Made_possible_logo_colour_JPEG-768x511.jpg 768w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Welsh_Made_possible_logo_colour_JPEG-1536x1022.jpg 1536w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Welsh_Made_possible_logo_colour_JPEG-2048x1362.jpg 2048w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Welsh_Made_possible_logo_colour_JPEG-600x400.jpg 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/div>[\/vc_column][vc_column width=&#8221;1\/3&#8243;][\/vc_column][\/vc_row][vc_row top_padding=&#8221;45&#8243; bottom_padding=&#8221;35&#8243;][vc_column width=&#8221;1\/1&#8243;][vc_column_text]<\/p>\n<h2><i class=\"fa fa-map-o\" aria-hidden=\"true\"><\/i> Sut i ddod o hyd i ni<\/h2>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row bottom_padding=&#8221;35&#8243; row_id=&#8221;visiting&#8221;][vc_column animation=&#8221;fade-in&#8221; width=&#8221;1\/2&#8243;][vc_column_text]<\/p>\n<table style=\"padding: 15px;\" border=\"1\" summary=\"A table listing the entrances of the park in the first column and the GPS co-ordinates in the second column.\" cellspacing=\"5\" cellpadding=\"10\">\n<caption>Dod o hyd i ni<\/caption>\n<thead>\n<tr class=\"table-header-row\">\n<th class=\"table-header\" colspan=\"1\" rowspan=\"1\" scope=\"col\">Pwynt mynediad<\/th>\n<th class=\"table-header\" colspan=\"1\" rowspan=\"1\" scope=\"col\">GPS (lledred \/ hydred)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr class=\"table-row-even\">\n<td class=\"table-even\" valign=\"top\">Prif fynedfa<\/td>\n<td class=\"table-odd\" valign=\"top\"><a href=\"https:\/\/www.google.co.uk\/maps\/place\/Cefn+Onn+Park\/@51.5460242,-3.1883328,17z\/data=!4m12!1m6!3m5!1s0x486e1c1a878fb13b:0xdc47663db2a03378!2sCefn+Onn+Park!8m2!3d51.5460242!4d-3.1861441!3m4!1s0x486e1c1a878fb13b:0xdc47663db2a03378!8m2!3d51.5460242!4d-3.1861441\" target=\"\" rel=\"noopener noreferrer\">51.5460242 \/ -3.1883328 <\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>[\/vc_column_text][vc_column_text]<strong>What3words<\/strong>: united.lend.tuck[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_raw_html]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[\/vc_raw_html][\/vc_column][\/vc_row][vc_row top_padding=&#8221;45&#8243; bottom_padding=&#8221;35&#8243;][vc_column width=&#8221;1\/1&#8243;][vc_column_text]<\/p>\n<h2><i class=\"fa fa-camera\" aria-hidden=\"true\"><\/i> Darganfod y parc<\/h2>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/4&#8243;]<div class=\"single_image wpb_content_element align-center  animate image_box_rounded image_opacity \" data-animation=\"fade-in\" data-delay=\"0\"><a href=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-6.jpg\" class=\"prettyPhoto\" rel=\"prettyPhoto[image]\"><img loading=\"lazy\" decoding=\"async\" width=\"950\" height=\"713\" src=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-6.jpg\" class=\"attachment-large\" alt=\"\" title=\"Parc Cefn Onn (6)\" srcset=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-6.jpg 950w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-6-300x225.jpg 300w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-6-768x576.jpg 768w\" sizes=\"auto, (max-width: 950px) 100vw, 950px\" \/><\/a><\/div>[\/vc_column][vc_column width=&#8221;1\/4&#8243;]<div class=\"single_image wpb_content_element align-center  animate image_box_rounded image_opacity \" data-animation=\"fade-in\" data-delay=\"0\"><a href=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-7-1.jpg\" class=\"prettyPhoto\" rel=\"prettyPhoto[image]\"><img loading=\"lazy\" decoding=\"async\" width=\"713\" height=\"950\" src=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-7-1.jpg\" class=\"attachment-large\" alt=\"\" title=\"Parc Cefn Onn (7)\" srcset=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-7-1.jpg 713w, https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/Parc-Cefn-Onn-7-1-225x300.jpg 225w\" sizes=\"auto, (max-width: 713px) 100vw, 713px\" \/><\/a><\/div>[\/vc_column][vc_column width=&#8221;1\/4&#8243;][\/vc_column][vc_column width=&#8221;1\/4&#8243;][\/vc_column][\/vc_row][vc_row top_padding=&#8221;45&#8243;][vc_column width=&#8221;1\/1&#8243;][vc_widget_sidebar sidebar_id=&#8221;parkinfo&#8221;][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row top_padding=&#8221;20&#8243; bottom_padding=&#8221;20&#8243;][vc_column width=&#8221;1\/2&#8243;][vc_column_text] Yngl\u0177n \u00e2 Parc Cefn Onn Mae\u2019r parc hanesyddol gradd 2 hwn, sydd ar ymylon gogleddol Caerdydd hefyd yn barc gwledig sy\u2019n rhoi mynediad at rwydwaith llwybrau troed Mynydd Caerffili. Mae\u2019n cynnwys casgliad hynod o goed cynhenid ac egsotig mewn dyffryn clos. Caiff ymwelwyr fwynhau\u2019r golygfeydd trawiadol a\u2019r awyrgylch braf, llonydd. Yn wreiddiol gosodwyd rhan uchaf y parc tua chanrif yn \u00f4l, gan y perchennog, Ernest Prosser, Cyfarwyddwr Rheilffordd Cwm Rhymni oedd gerllaw. Mae ei nentydd a llwybrau troellog yn dilyn y cwm ysgafn lle llifa\u2019r Nant Fawr. Mae\u2019r nentydd, pyllau, coetir a phlanhigion eraill yn gwneud hon yn noddfa ar gyfer bywyd gwyllt. Mae ymwelwyr yn dychwelyd yn rheolaidd i fwynhau\u2019r parc mewn gwahanol dymhorau. [\/vc_column_text][\/vc_column][vc_column el_class=&#8221;visitorbox&#8221; bg_color=&#8221;#054aa4&#8243; width=&#8221;1\/2&#8243;][vc_column_text el_class=&#8221;visitor&#8221;] Gwybodaeth i ymwelwyr Mae\u2019r parc ar agor o 7am tan 30 munud cyn y machlud. Parcio ar gael ar y safle. [\/vc_column_text][\/vc_column][\/vc_row][vc_row top_padding=&#8221;45&#8243; bottom_padding=&#8221;35&#8243;][vc_column width=&#8221;1\/1&#8243;][vc_column_text] Nodweddion [\/vc_column_text][\/vc_column][\/vc_row][vc_row bottom_padding=&#8221;35&#8243;][vc_column animation=&#8221;fade-in-from-left&#8221; width=&#8221;1\/2&#8243;][\/vc_column][vc_column width=&#8221;1\/2&#8243;][\/vc_column][\/vc_row][vc_row top_padding=&#8221;45&#8243; bottom_padding=&#8221;35&#8243;][vc_column width=&#8221;1\/1&#8243;][vc_column_text] Cyfleusterau [\/vc_column_text][\/vc_column][\/vc_row][vc_row bottom_padding=&#8221;35&#8243;][vc_column animation=&#8221;fade-in-from-left&#8221; width=&#8221;1\/1&#8243;][\/vc_column][\/vc_row][vc_row bottom_padding=&#8221;35&#8243;][vc_column animation=&#8221;fade-in-from-left&#8221; width=&#8221;1\/1&#8243;][vc_column_text] Llogi sgwteri Tramper ym Mharc Cefn Onn Gyda chefnogaeth Cronfa Treftadaeth y Loteri, rydyn ni wedi ymuno \u00e2 Countryside Mobility, i ddarparu dau sgwter symudedd sy&#8217;n addas ar gyfer pob math o dir i\u2019w [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":0,"parent":3194,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-6086","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Parc Cefn Onn - Outdoor Cardiff<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.outdoorcardiff.com\/cy\/parciau\/parc-cefn-onn\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Parc Cefn Onn - Outdoor Cardiff\" \/>\n<meta property=\"og:description\" content=\"[vc_row top_padding=&#8221;20&#8243; bottom_padding=&#8221;20&#8243;][vc_column width=&#8221;1\/2&#8243;][vc_column_text] Yngl\u0177n \u00e2 Parc Cefn Onn Mae\u2019r parc hanesyddol gradd 2 hwn, sydd ar ymylon gogleddol Caerdydd hefyd yn barc gwledig sy\u2019n rhoi mynediad at rwydwaith llwybrau troed Mynydd Caerffili. Mae\u2019n cynnwys casgliad hynod o goed cynhenid ac egsotig mewn dyffryn clos. Caiff ymwelwyr fwynhau\u2019r golygfeydd trawiadol a\u2019r awyrgylch braf, llonydd. Yn wreiddiol gosodwyd rhan uchaf y parc tua chanrif yn \u00f4l, gan y perchennog, Ernest Prosser, Cyfarwyddwr Rheilffordd Cwm Rhymni oedd gerllaw. Mae ei nentydd a llwybrau troellog yn dilyn y cwm ysgafn lle llifa\u2019r Nant Fawr. Mae\u2019r nentydd, pyllau, coetir a phlanhigion eraill yn gwneud hon yn noddfa ar gyfer bywyd gwyllt. Mae ymwelwyr yn dychwelyd yn rheolaidd i fwynhau\u2019r parc mewn gwahanol dymhorau. [\/vc_column_text][\/vc_column][vc_column el_class=&#8221;visitorbox&#8221; bg_color=&#8221;#054aa4&#8243; width=&#8221;1\/2&#8243;][vc_column_text el_class=&#8221;visitor&#8221;] Gwybodaeth i ymwelwyr Mae\u2019r parc ar agor o 7am tan 30 munud cyn y machlud. Parcio ar gael ar y safle. [\/vc_column_text][\/vc_column][\/vc_row][vc_row top_padding=&#8221;45&#8243; bottom_padding=&#8221;35&#8243;][vc_column width=&#8221;1\/1&#8243;][vc_column_text] Nodweddion [\/vc_column_text][\/vc_column][\/vc_row][vc_row bottom_padding=&#8221;35&#8243;][vc_column animation=&#8221;fade-in-from-left&#8221; width=&#8221;1\/2&#8243;][\/vc_column][vc_column width=&#8221;1\/2&#8243;][\/vc_column][\/vc_row][vc_row top_padding=&#8221;45&#8243; bottom_padding=&#8221;35&#8243;][vc_column width=&#8221;1\/1&#8243;][vc_column_text] Cyfleusterau [\/vc_column_text][\/vc_column][\/vc_row][vc_row bottom_padding=&#8221;35&#8243;][vc_column animation=&#8221;fade-in-from-left&#8221; width=&#8221;1\/1&#8243;][\/vc_column][\/vc_row][vc_row bottom_padding=&#8221;35&#8243;][vc_column animation=&#8221;fade-in-from-left&#8221; width=&#8221;1\/1&#8243;][vc_column_text] Llogi sgwteri Tramper ym Mharc Cefn Onn Gyda chefnogaeth Cronfa Treftadaeth y Loteri, rydyn ni wedi ymuno \u00e2 Countryside Mobility, i ddarparu dau sgwter symudedd sy&#8217;n addas ar gyfer pob math o dir i\u2019w [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.outdoorcardiff.com\/cy\/parciau\/parc-cefn-onn\/\" \/>\n<meta property=\"og:site_name\" content=\"Outdoor Cardiff\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-09T10:32:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.outdoorcardiff.com\/wp-content\/uploads\/2016\/04\/OutdoorLogo.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"430\" \/>\n\t<meta property=\"og:image:height\" content=\"95\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.outdoorcardiff.com\\\/cy\\\/parciau\\\/parc-cefn-onn\\\/\",\"url\":\"https:\\\/\\\/www.outdoorcardiff.com\\\/cy\\\/parciau\\\/parc-cefn-onn\\\/\",\"name\":\"Parc Cefn Onn - Outdoor Cardiff\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.outdoorcardiff.com\\\/cy\\\/#website\"},\"datePublished\":\"2021-11-16T11:46:05+00:00\",\"dateModified\":\"2026-03-09T10:32:50+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.outdoorcardiff.com\\\/cy\\\/parciau\\\/parc-cefn-onn\\\/#breadcrumb\"},\"inLanguage\":\"cy\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.outdoorcardiff.com\\\/cy\\\/parciau\\\/parc-cefn-onn\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.outdoorcardiff.com\\\/cy\\\/parciau\\\/parc-cefn-onn\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Hafan\",\"item\":\"https:\\\/\\\/www.outdoorcardiff.com\\\/cy\\\/croeso-i-awyr-agored-caerdydd-2\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Parciau yng Nghaerdydd\",\"item\":\"https:\\\/\\\/www.outdoorcardiff.com\\\/cy\\\/parciau\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Parc Cefn Onn\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.outdoorcardiff.com\\\/cy\\\/#website\",\"url\":\"https:\\\/\\\/www.outdoorcardiff.com\\\/cy\\\/\",\"name\":\"Outdoor Cardiff\",\"description\":\"Explore Cardiff&#039;s trails\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.outdoorcardiff.com\\\/cy\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"cy\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Parc Cefn Onn - Outdoor Cardiff","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.outdoorcardiff.com\/cy\/parciau\/parc-cefn-onn\/","og_locale":"en_US","og_type":"article","og_title":"Parc Cefn Onn - Outdoor Cardiff","og_description":"[vc_row top_padding=&#8221;20&#8243; bottom_padding=&#8221;20&#8243;][vc_column width=&#8221;1\/2&#8243;][vc_column_text] Yngl\u0177n \u00e2 Parc Cefn Onn Mae\u2019r parc hanesyddol gradd 2 hwn, sydd ar ymylon gogleddol Caerdydd hefyd yn barc gwledig sy\u2019n rhoi mynediad at rwydwaith llwybrau troed Mynydd Caerffili. 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