Updated 15th October 2005; 9th January, 20th May , 7th October 2006

The entrance is marked CA4 with square and cross and the original explorers appear to have dropped at least two pitches (p18 and p14) to the head of another drop in the western arm of a 2m wide rift. The eastern side of the rift is draughting. Here there are 12 and 10m pitches.
In the summer of 2006, two trips appeared to "finish" the hole. To the west 36m and 42m ropes were used to explore pitches of 14, 12, 5, 13 and 8m to obtain the previously reached level. From here, an undescended 12m pitch was dropped and found to be blind.
Higher up the shaft, a traverse out to the east enabled a blind 8m pitch to be explored.

References: anon., 2005b (Easter & summer); Corrin Juan, 2006a; anon., 2006b (Easter logbook); anon., 2006d (summer 2006); Corrin Juan, 2007; León García José, 2010 (Volume 1 and Volume 2) (survey and photo)
Entrance pictures: yes
Underground picture: yes
Video:
Detailed Survey : 1:500 pdf (2005)  1:500 pdf Easter 2006  1:500 pdf summer 2006
Line survey:
On area survey:
Survex file: yes (Amended magnetic declination December 2013 to align with Eur79 grid and coordinates altered to fit ETRS89 datum, April 2014.)