Small entrance in dry valley near track.
Follow the old tramway up from Carreg Haffes farm towards the stone walling and as the path crosses the top of the Dan-yr-Ogof dry valley, look for the entrance a few yards from the track on the right.
Description
This is a vertical pothole, originally as 5 pitches down to a sump, but now with an alternative 3 pitch route (no easier, CUCC Old Flyover, with a tight section and 47m pitch). Above the sump (normally 4m deep), Enterprise Aven series rises 50m; other aven climbs have also topped out..
History
Wessex Caving Club & SWCC, 1946; Cardiff UCC 2010; CDG et al. 2007,2011-2020 (Poacher's Passage, 2011; Enterprise Aven 2012-2013)