Updated 9th November 2003; 2nd May 2004; 28th October 2007; 6th January, 19th May 2011; 7th October 2012; 30th June 2018

The entrance, above the sloping track, is a wide pitch of 11m. A stream enters from a stream passage 5m up the right hand wall. The water pours down a blind 10m pot and the way on is over this to a small vadose passage which leads after 75m to a small climb and pitch of 6m. A small zig-zag passage then runs to the head of a 25m pitch. At the base, the passage slopes down to a tiny static sump. A hading rift from here ascends to an aven where it is possible to get a voice connection with the top of the 25m pitch.

A dry crawl under the north wall of the entrance chamber leads to a blind 10m pot.

By using a different belay point a second series of seemingly unconnected passages can be entered by swinging on the ladder to a hole in the south wall of the entrance shaft. A short passage ends at a fine 23m pitch which is followed by 40m of tight canyon to a 6m pitch. The boulder slope is followed down. A climb up to the right closes down while a climb to the left needs looking at.

The 1992 extensions start by climbing down through the boulders to a squeeze into a narrow rift pitch. Downstream leads to a flatout section which can be bypassed. The route slowly increases in size and leads to a climb and a ladder pitch down and immediately another pitch (sizes?) to a small chamber and passage which eventually became smaller.

A short distance before a small inlet which goes 40m splits and chokes. The left hand branch chokes, ending in a short section of rift. A climb up in the roof enters a section of well decorated phreatic passage ending in a sandy, easy dig.

Opposite this section of passage, an easy crawl enters a 5m diameter conical shaped chamber with a way out which ends in tubes and climbs up which need pushing.

Upstream at the base of the ladder pitch mixed going divides - the left hand section ends in a choked rift and the right hand needs a little digging to enter a small continuation.

The cave comes close to Torca de Simón 2 (766).

Re-explorations by ADEMCO in 2011 found nothing new.

References: anon., 1978 (logbook); Corrin J et al, 1978 (survey and photo); Corrin J S and Smith P, 1981; Manchester University Speleological Society, 1982 (survey); material in file; anon., 1992b (logbook); Corrin J and Quin A, 1992 (survey and photo); Corrin J, 1993 (survey); anon., 1993b (logbook); Corrin J, 1994b (survey); anon., 2004b (Easter logbook); Corrin Juan and Smith Peter, 2007; ADEMCO, 2012
Entrance picture : yes
Underground picture(s): entrance pitch (1978)
Detailed Survey : from 1978: low res  high res
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.)
with others close by, and Cueva Fresnedo (Amended magnetic declination December 2013 to align with Eur79 grid and coordinates altered to fit ETRS89 datum, April 2014.)
Passage direction rose diagram: 30/6/2018