River Geirionydd

{{Short description|River in Snowdonia, Wales}}

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

{{coord|53.130|-3.850|display=title|region:GB_scale:5000}}

{{Infobox river

| name = River Geirionydd

| native_name = {{native name|cy|Afon Geirionydd}}

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| image = Waterfall near Klondyke Lead Mine Ruins - geograph.org.uk - 223638.jpg

| image_size = 250px

| image_caption = The River Geirionydd near Klondyke mill

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| subdivision_name1 = Wales

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| source1 = Llyn Geirionydd

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| mouth = confluence with Afon Crafnant

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The River Geirionydd ({{langx|cy|Afon Geirionydd}}) is a river in Snowdonia, North Wales. It is a tributary of the River Crafnant (Afon Crafnant), which flows over the Fairy Falls waterfall in Trefriw,{{cite book|author=John Barden Davies|title=Betws-y-Coed, Llanrwst and Trefriw Through Time|url=https://books.google.com/books?id=n-hiCgAAQBAJ&pg=PT178|access-date=20 June 2017|date=15 September 2015|publisher=Amberley Publishing Limited|isbn=978-1-4456-5090-6|page=178}} and thence on into the River Conwy (Afon Conwy), which is the main river of the Conwy valley.

It flows from Llyn Geirionydd{{cite book|author=Samuel LEIGH (Publisher.)|title=Leigh's Guide to Wales and Monmouthshire|url=https://books.google.com/books?id=BpNeAAAAcAAJ&pg=PA119|access-date=20 June 2017|year=1831|page=119}} down a steep gorge before joining the river Crafnant.{{cite book|title=Country Life|url=https://books.google.com/books?id=2Q0QAQAAMAAJ|access-date=20 June 2017|year=1980|publisher=Country Life, Limited|page=1678}} It is less than a mile in length.

The river passes the former Klondyke mill,{{cite book|author=David Morgan Rees|title=The industrial archaeology of Wales|url=https://books.google.com/books?id=2jrlAAAAIAAJ|access-date=20 June 2017|year=1975|publisher=David & Charles|page=141}} which used its waters. Klondyke was a mining and milling complex connected with some of the metal mines of the Gwydir Forest by means of an old tramway which ran alongside Llyn Geirionydd. From above the mill wagons used to enter the building via an aerial ropeway.

The Welsh language poet, clergyman, antiquary and literary critic Evan Evans ({{lang|cy|Ieuan Glan Geirionydd}}, 1795–1855) was born on a freehold on banks of the river.{{cite book|author=John Jenkins|title=The Poetry of Wales|url=https://archive.org/details/poetrywales00jenkgoog|year=1873|publisher=Houlston|page=[https://archive.org/details/poetrywales00jenkgoog/page/n48 44]}}

File:Klondyke Lead Mine Ruins - geograph.org.uk - 207826.jpg