Mynydd Graig Goch was previously recorded as peaking at 1,998ft (609m), just two feet shorter than the required height to tip a hill into the category of mountain. But now three ramblers have measured the muddy peak at six inches over 2,000ft, challenging previous Ordnance Survey measurements and precipitating a formal reclassification.
Mynydd Graig Goch is home to the crag Craig Cwm Dulyn, a little climbed outcrop to the south west of Cwm Silyn. It is still unknown if the recorded climbs on this crag are in fact two and a half feet longer than the current guidebook descriptions and whether the newly found extra height will have any significant bearing on the grades of these routes...
Read More: http://www.ukclimbing.com/news/older.html?month=09&year=2008#n45330 
