UWCH-Y-GARREG (UWCH-GAREG), a township, in the parish and union of MACHYNLLETH, lower division of the hundred of MACHYNLLETH, county of MONTGOMERY, NORTH WALES, 6 miles (S. E.) from Machynlleth; containing 372 inhabitants. It comprises the upper portion of the parish, which consists principally of boggy elevations and barren wastes; and the rateable annual value is returned at £1449. Moel Vadyn is a conical eminence rising one thousand eight hundred and sixty- four feet above the level of the sea; the lofty Plinlimmon bounds the township on the south-west, and at its base is a pool called Gliislyn, or " the Blue Lake." Nearly half-way to Llanidloes, and about a mile and a half from the road, is a very picturesque waterfall, designated Pistyll Rhaiadr, flamed by a stream that here precipitates itself with great force over several rocky ledges, one of which is perpendicular and of considerable height. The road from. Machynlleth to Llanidloes passes through the township; and a short distance to the right of it, not far-from Glislyn, are some lead- mines, which have been only partially worked, though the ore is said to contain some silver. There are three Sunday schools, appertaining to dissenters, in which about 210 males and females are gratuitously instructed.