Looking at a possible activation of RhialgwmGW/NW-046 maybe next Friday.
The map shows a route in from the bottom end of Lake Vyrnwy (an old OS map of mine shows this as a greenlane/off road track) and was looking at this as an option.
Not recent but I’ve seen MX bikes riding along there, might be wide enough for a 4x4.
The bottom end near Lake Vyrnwy to the start of the “south” route was tarmac, although it was in a pretty bad state last time I went that way a few years ago.