Updated 19th February 1999; 18th January 2004; 31st October 2007; 18th January 2011

An alternative gird reference given in León García José, 2010 (Volume 1 and Volume 2). (Cantabria Subterránea. Catálogo Grandes Cavidades.) is 30T 0455500 4793700, Alt 280m.

Only partly descended by the Matienzo expeditions (the shaft is currently out of our permitted area), it has been fully explored by the F.C.M.E. group down to a depth of 132m.

Pitches of 25m and 41m are followed by a boulder slope to a final pitch of 35m, Pozo de las Ventanas, where one of the windows leads to a 12m parallel shaft. The altitude at the bottom would put it only some 15m above the Ogarrio resurgence level.

References: Meijide Calvo M, 1982; Corrin J S and Smith P, 1981; anon., 1993b (logbook); anon., 1993a (survey); García José León, 1997 (survey); Valero Enrique y Soriano Ángel, 2007; León García José, 2010 (Volume 1 and Volume 2) (survey)
Entrance picture :
Underground picture(s):
Detailed Survey : from anon., 1993a (AEC Lobetum): high res  low res
Line Survey :
On area survey :
Survex file :