Ogof Agen Allwedd

The cave was first investigated by Brian Price and party in 1949 and 1950, but it was not until 1957 that the Hereford Caving Club broke through the First Boulder Choke and found the main part of the cave.

Ogof Agen Allwedd is the longest cave system on the Llangattock escarpment, with over 32.5 km of passages. There are several round trips that can be followed within the system, but all trips start via the short entrance series and first boulder choke. Crawling is required for the long entrance passages but most of the cave consists of large stream passages which provide easy caving and no specialist equipment is required. The round trips include the Grand Circle – along Main Stream Passage, which has four boulder chokes (rock obstructed passages) in it, and Southern Stream Passage, a long, wet and tedious passage. There are also the Outer and the Inner Circles, which include Turkey…

Originally, the cave was accessed through the Agen Allwedd entrance, but gated access is now available through the Ogof Gam entrance. This provides a bypass to an awkward rift section and that route is now blocked with a pillar. Keys are available to people with valid permits who must sign the book on entering the cave indicating the route to be taken. No carbide is to be used in the cave and additional permits are required for camping inside, blasting or research.