005 Cueva del Mortiro (Sistema Mortiro-Esquileña)
Riba VN54769332 (top entrance) Alt. 155m Length 770m

A through trip described from the bottom entrance, called Cueva Esquileña. The first 200m in the water are the most awkward and after 300m a one metre long duck has to be negotiated. The passage continues with wading in places until a boulder pile is reached. The surface is reached by a climb up a 9m pitch or by carrying on in the streamway for a few more metres to emerge in the Hoyo del Mortiro. A wet and sporting cave.

The survey in Actividades Regionales. Exploraciones en Cantabria (anon., 1993a) is a copy of the reference survey in Report of the British Expedition to Matienzo (Kendal Caving Club and Manchester University Speleological Society, 1975).

References: anon., 1974b (logbook); anon., 1974a; anon., 1975b (logbook); Kendal Caving Club and Manchester University Speleological Society, 1975 (survey); Fernández Gutiérrez J C, 1975; Manchester University Speleological Society, 1982 (survey); Mills L D J, 1981; Corrin J S and Smith P, 1981; anon., 1993a (survey)
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