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|---|---|---|---|---|
 The A4059 passes through the Brecon Beacons | ||||
| Route information | ||||
| Length | 9.5 mi (15.3 km) | |||
| Major junctions | ||||
| North end | A470, Beacons Reservoir | |||
 A470 A465 A4061 A465 A470 | ||||
| South end | A470, Abercynon | |||
| Location | ||||
| Country | United Kingdom | |||
| Constituent country | Wales | |||
| Primary destinations | Hirwaun Aberdare Mountain Ash Abercynon | |||
| Road network | ||||
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The A4059 road is a single-carriageway north–south road that runs between the A470 at Brecon Beacons National Park and the A470 at Abercynon.