Guided Walk to the Chartist Caves
Sat 25 Oct
|Trefil Road
Guided walk to Chartist caves, Trefil with qualified mountain guide.


Time & Location
25 Oct 2025, 10:00 – 14:30
Trefil Road, Trefil Rd, Tredegar NP22, UK
About the Event
Leader: Steve Drowley Grade: Moderate
PLEASE NOTE: Walkers are advised to wear walking boots, waterproofs and bring water and packed lunch. Meeting point is at Top House pub, Trefil at 10am for a 10:30 start. Steve Drowley is a qualified mountain leader but all walkers join us at their own risk and are responsible for their own safety. Under 18s must be accompanied by a parent or guardian.
A guided walk to the Chartist Cave, also known by two Welsh names; Ogof Fawr (the ‘Big Cave’) and earlier as Tylles Fawr (the ‘Great Hole’). The more commonly used modern name “Chartist Cave” dates from 1839 when Chartist reformers used the cave to stockpile weapons in advance of their march on Newport on 4th November of that year. There is a plaque at the entrance to the cave commemorating the actions of the Chartists.
Arweinydd: Steve Drowley Gradd: Cymedrol
SYLWER: Cynghorir cerddwyr i wisgo esgidiau cerdded, dillad dal dŵr a dod â dŵr a phecyn bwyd. Man cyfarfod yw’r dafarn Top House, Trefil am 10yb ar gyfer dechrau am 10:30. Mae Steve Drowley yn arweinydd mynydd cymwysedig ond mae pob cerddwr yn ymuno ar eu risg eu hunain ac yn gyfrifol am eu diogelwch eu hunain. Rhaid i rai dan 18 oed fod yng nghwmni rhiant neu warcheidwad.
Taith dywysedig i Ogof y Chartistiaid, a elwir hefyd wrth ddau enw Cymraeg; Ogof Fawr (‘Yr Ogof Fawr’) ac yn gynharach fel Tylles Fawr (‘Y Twll Mawr’). Daw’r enw modern a ddefnyddir yn fwyaf cyffredin heddiw “Ogof y Chartistiaid” o 1839 pan ddefnyddiodd y Chartistiaid yr ogof i storio arfau cyn eu gorymdaith i Gasnewydd ar 4 Tachwedd y flwyddyn honno. Mae plac wrth fynedfa’r ogof yn coffáu gweithredoedd y Chartistiaid.