The entrance in the face of the scar is reached by a short climb to the west. The high passage passes below a wedged boulder to a drop down to the right after 11m. This enters a low descending passage which has been described in Northern Caves as having a vocal connection with Horseshoe Cave.
The main passage continues to the left beneath a high aven for a futher 40m, reaching the Neck - a low crawl for 6m. This opens out into the 12m high pool chamber. An 8m climb up reaches an impossible squeeze into a chamber where a passage can be seen leading off.
The passage from the pool chamber descends a stalagmite cascade to the right into a high passage. The boulder chamber is reached after 70m. To the left, the Stemple drops down 2m into a tight figure-of-8 passage. A traverse turns right and passes over small pools before reaching the final chamber after a further 36m.
Attermire Cave appears to have been used during the Neolithic, Bronze Age, Iron Age and Romano-British periods. Excavation revealed human remains, flint artefacts, Neolithic pottery, brooches, coins, the remains of a chariot and animal bones.