EntityQ3401505· pop 7· linked from 28 articlesTwyn LlechSign in to savemountain (703.6m) on the Welsh-English border in the UKConnectionstopographic prominenceEntityEnglandEntityWalesEntitygeographic coordinate systemEntityInternational Standard Book NumberEntityWelshEntityhillEntitymountain rangeEntityDevonianEntitysandstoneEntityHerefordshireEntitysummitEntityhostelEntityQ156150Entitytopographic mapEntityLast Glacial PeriodEntitymoorlandEntitymudstoneEntityQuaternary glaciationEntityYorkshire DalesEntityCategoriesBlack Mountains, WalesHewitts of EnglandHewitts of WalesHighest points of English countiesHills of HerefordshireMarilyns of EnglandMarilyns of WalesMountain ranges of the Brecon Beacons National ParkMountains and hills of PowysNuttalls