Pollnagollum–Poulelva (usually referred to as Pollnagollum or Poulnagollum) is an active stream passage cave situated in County Clare, Ireland.

The system primarily consists of winding stream passages which interconnect in various ways, offering a great variety of through trips.

The cave is usually entered via the Pollnagollum entrance, with the main streamway encountered a short distance inside.

[2] In 1952 cavers from the RAF discovered Branch Passage Gallery and in 1953 they connected it to the rest of the cave.

A full survey was carried out in the 1960s by the University of Bristol Spelaeological Society, by which time 10 kilometres (6.2 mi) of cave had been discovered.