B4299 (Gurnos - Brynamman)
|Location Map ( geo)|
|Distance:||5.5 miles (8.9 km)|
|Now part of:||A4068|
|Route outline (key)|
The original route of the B4299 ran along the edge of the Black Mountain in south Wales.
It started on the B4297 (now A4067) in Gurnos, Brecknockshire, in the Swansea Valley. It then headed northwest via Cwm-twrch Isaf and Cwm-twrch Uchaf along the valley of the Twrch River. Eventually the road crossed the river - and entered Carmarthenshire - before passing through the Glamorganshire village of Cwmllynfell.
The road was upgraded to Class I status in 1935, being renumbered A4068. It retains this number except for in Gurnos itself, which is now bypassed.