:Afon Cerist

{{short description|River in Wales}}

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

{{Infobox river

| name = Afon Cerist

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| image = View east from the Cribin ridge - geograph.org.uk - 663891.jpg

| image_size = 250

| image_caption = The valley of the Afon Cerist seen from Cribin Fawr

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| subdivision_type1 = Country

| subdivision_name1 = Wales

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|length_mi=4.7

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| source1 = Maesglase

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| source1_elevation = {{convert|1419|ft|abbr=on}}

| mouth =

| mouth_location = Dinas Mawddwy

| mouth_coordinates = {{coord|52.7206|-3.6876|type:river_region:GB|format=dms|display=inline,title}}

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The Afon Cerist is a small river that flows from underneath Craig Portas, the cliffs on the north side of Maesglase mountain, to meet the River Dyfi at Dinas Mawddwy.{{cite book|author=Edwyn Jervoise|title=The Ancient Bridges of Wales and Western England|url=https://books.google.com/books?id=hwQFAAAAMAAJ|year=1936|publisher=Architectural Press}} It forms the northern border of the Dyfi Hills.