The R577 is a Regional Route in South Africa that connects Roossenekal with Lydenburg.[1]
| Country: | ZAF |
| Type: | R |
| Route: | 577 |
| Length Km: | 64.6 |
| Direction A: | West |
| Terminus A: | in Roossenekal |
| Direction B: | East |
| Terminus B: | near Lydenburg |
| Previous Type: | R |
| Previous Route: | 576 |
| Next Type: | R |
| Next Route: | 578 |
Its western terminus is a junction with the R555 at Roossenekal, Limpopo. It heads east, becoming the Jaap-se-Hoogte Pass, then becoming the De Berg Pass through the Steenkampsberg mountains, to end at an intersection with the R540 south of Mashishing (Lydenburg), Mpumalanga.