River Machno

{{Short description|River in north Wales}}

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

{{Infobox river

| name = River Machno

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

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| image_size = 250px

| image_caption = The River Machno at Pont Rhyd-y-Gro

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| subdivision_type1 = Country

| subdivision_name1 = Wales

| subdivision_type2 = Part

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| mouth_location = Confluence with River Conwy

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River Machno ({{langx|cy|Afon Machno}}) is a river in Snowdonia in north-west Wales, United Kingdom. It is the first major tributary of the River Conwy, which it joins south of Betws-y-coed, past the Pandy Falls and the Machno Falls.

The river originates in the hills surrounding the village of Penmachno. It has its source in the slopes at the head of the Machno valley, and flows through the villages of Cwm Penmachno and Penmachno.{{fact|date=July 2024}}

The Snowdonia Slate Trail follows the whole length of the Machno Valley.{{fact|date=July 2024}}