Updated 6th November 2003; 28th October 2007; 9th, 24th September, 10th November, 4th December 2015

The eastern of three entrances to the Orillón cave system. This is a 25m sloping shaft with a vertical drop at the base and is not the normal entrance (which is Orillonzuco - site 1162). The third entrance is Malbujero, site 1161. A possible fourth entrance is site 4201 although this has not been explored through. A complete resurvey occurred in 2015 and the system, including water tracing, is described under entrances 1162 and 1161.

References: Fernández Gutiérrez et al, 1966 (survey and photo); anon., 1974b (logbook); anon., 1974a; Cox G, 1973; Kendal Caving Club and Manchester University Speleological Society, 1975 (survey); Manchester University Speleological Society, 1982 (survey); Corrin J S and Smith P, 1981; Ortiz E, 1968; Notenboom J and Meijers I, 1985; anon., 1996a (Easter logbook); Smith Peter and Ruiz Cobo Jesús, 1999; Ruiz Cobo Jesús and Smith Peter, 2003 (photo of axe); Corrin Juan and Smith Peter, 2007; also see site 1162 for references; anon., 2015c (summer logbook); anon., 2015d (autumn logbook)
Entrance picture : yes
Underground picture(s): See Orillonzuco 1162
Detailed Survey : See Orillonzuco 1162
Line Survey :
On area survey : 1975 Ozana area map. Not a lot of detail. low res  high res
Survex file : See Orillonzuco site 1162
Passage direction rose diagram: 30/6/2018