Figure of eight walk taking in the S and N Black Mts, starting with Bryn Arw, Skirrid, Deri, Sugarloaf and Twyn y Gaer. Night section is Chwarel y Fan, Bal Mawr and Bal Bach. Unsupported so bring enough food for the first leg (4700') and then at the cars re-supply lunch boxes before second leg (4300')
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