Lady of the Lake Mountain Dog Walk off the Trecastle Mountain Road
Getting there from Craig y Nos Castle
Go right out of the castle, take A4067 towards Brecon. After a few hundred yards, having passed the Welsh Show Caves, aka Dan Yr Ogof show caves, on your left, and the Gwynne Arms Pub which is off to your right, you will come to the Tafan Y Garreg Pub, currently painted a bright peachy pink colour.
Turn left after the Tafan y Garreg Pub car park on your left (car park is opposite the pub), heading up a single track lane. It winds through woods and eventually you come on to open mountainside, with a mountain valley stretching up ahead of you.
Soon after you cross the first cattle grid you will cross a small bridge over the stream. The stream is now on your left. Park first available space on the left. There are further spaces higher up, including a more 'main' looking space that will take 2 or 3 cars. Paths lead from here to the lake.
As the paths become virtually non-existent as you head across open mountainside, it is easy to miss the lake and never find the correct walk.
If you park first left after bridge, you can cross the river if it is low (stones are very slippery so a walking stick or two would be handy), then follow the stream going up the hill. You will pass loads of small waterfalls on this upward walk alongside the stream.
If you park higher up, you will still need to cross a stream or two but it is a bit easier. However the promising initial path does completely disappear. You head in the same direction as to where the path should be if it continued, until you come to the lake. It takes a good hour and you may feel as if you will never get there. It is only because I know it is there that I know to plough on and upwards!