The Afon Artro is a technical whitewater river in Wales, United Kingdom, running from Cwm Bychan lake down to Llanbedr. The river is visible from the road, which makes level assessment straightforward before committing to a run. The standard put-in is where the river leaves the lake, and the typical take-out is at a layby just above the second weir near Llanbedr.

The upper section from the lake begins with a technical, rocky stretch characterized by continuous rapids and numerous bumps and scrapes. A notable three-part fall sits along this stretch and can be inspected from river right, with rescue positions available just below the middle section of the fall. The Afon Cwmnantcol joins from river left just below a bridge, adding volume to the flow. From that confluence down to the Llanbedr road bridge, the run is continuous. Approximately 200 metres below the road bridge sits a weir that is runnable with care. Paddlers typically exit just above the second weir, adjacent to a layby.

Tree strainers have been noted across portions of the river and may require portaging, making vigilance essential throughout the run. The river runs best after rainfall in Wales, when water levels are elevated enough to make the rocky sections more manageable.

The Afon Artro is described as a rewarding and enjoyable river to paddle, offering a compact but engaging whitewater experience. Its relatively short length and road-visible nature make it practical for a day trip, and the combination of technical rocky rapids, a multi-part fall, and weirs provides variety across the run.