Chwarel y Fan

{{Short description|Mountain (679m) in Monmouthshire, Wales}}

{{Use dmy dates|date=April 2022}}

{{Infobox mountain

| name = Chwarel y Fan

| photo = Chwarelyfan.JPG

| photo_caption = The Chwarel y Fan summit ridge

| elevation_m = 679

| elevation_ref =

| prominence_m = 72

| parent_peak = Waun Fach

| listing = Hewitt, Nuttall, County top

| translation = quarry of the beacon

| language = Welsh

| location = Black Mountains, South Wales

| range =

| coordinates = {{coord|51.95826|N|3.080948|W|type:mountain_scale:100000|format=dms|display=inline,title}}

| map = Wales Monmouthshire

| map_caption = Within Monmouthshire

| map_size =

| label_position = bottom

| grid_ref_UK = SO258294

| topo = OS Landranger 161

| type =

| age =

| last_eruption =

| first_ascent =

| easiest_route =

}}

Chwarel y Fan is a peak in the Black Mountains in south-eastern Wales. It is the highest rise on the long ridge which extends southeastwards from Rhos Dirion. The ridge continues southeastwards to the lesser summit of Bal-Mawr whose top is adorned by a trig point at {{convert|607|m|ft}} above sea level. About {{Convert|1|km|abbr=on|spell=in}} southeast along the ridge is the lesser top of Bal-Bach at a height of just over {{convert|520|m|ft}}. Chwarel y Fan is the county top of the historic county of Monmouthshire, and is also the highest point in the current local government area of Monmouthshire.

The summit is on a thin ridge and is crowned by a cairn. On the other sides of the valleys: to the west is Pen Twyn Mawr and to the east is Black Mountain.Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. {{ISBN|1-85284-304-7}}.