Afon Marteg

{{Short description|River in Wales}}

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{{EngvarB|date=August 2019}}

File:View from the top - geograph.org.uk - 1294098.jpg

The Afon Marteg is a river in Powys, Wales.

It is about 15 km long, flowing roughly south-west to join the Wye at Pont Marteg (grid reference SN952714) about 5 km above Rhayader.Ordnance Survey Landranger 1:50,000 map, sheet 136 or 147

Fishing is available, with appropriate permits, for brown trout, chub, dace, grayling and pike.{{Cite web |url=https://www.waterscape.com/things-to-do/fishing/fisheries/7518/river-marteg-st-harmon-to-wye-confluence |title = Fishing – Canal & River Trust |archive-url=https://archive.today/20121217195341/https://www.waterscape.com/things-to-do/fishing/fisheries/7518/river-marteg-st-harmon-to-wye-confluence |archive-date=17 December 2012 |url-status=dead}} The river has a run of spawning Atlantic salmon in the autumn.{{cite web|url=http://www.rhayaderangling.co.uk/rivers.htm |title=Rivers |accessdate=2008-11-14 |url-status=dead |archiveurl=https://web.archive.org/web/20090130143453/http://rhayaderangling.co.uk/rivers.htm |archivedate=2009-01-30 }}