Updated 19th February 1999; 23rd February 2001; 13th May 2011

A 2x1m entrance. Explored by Spanish SEAD group - all leads close down. Marked M25 with green paint. Reference anon., 1990a states that site M25 has a depth of 195m.

In 1993 the shaft was linked to Torca del Triveno (617) at the base of the first pitch(?)

References: pers comm. Jan '86; Sociedad Espeleologia Lenar, 1985; Garcia J L, 1987; anon., 1990a; anon., 1993b (logbook); Neill Alasdair and Jackson Keith, 1993 (survey); Corrin J, 1994a; Corrin Juan, 1995b; García José León, 1997 (survey); anon., 2011b (Easter logbook)
Entrance picture : yes
Underground picture(s):
Detailed Survey : 1:1000
Line Survey :
On area survey :
Survex file :