Lago Ercina

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Site list (GPS fixes) Walks (GPS tracks)  Video clips Panoramas

Coordinates used

Electronic projects:

 Bat detector
 Lamp tests
 µ-controlled lamp
 SEPIC-based lamp
 ISP isolators
 Making SMT boards

Expedition logs:

 1973, 1974, 1975,
 1976, 1977, 1979,
 1982, 1983, 1985,
 1986, 1987, 1988,
 1989, 2000, 2001,
 2002, 2003, 2004,
 2005, 2006, 2007,
 2008, 2009, 2010,
 2011, 2012, 2013,
 2014, 2015, 2016,
 2017, 2018, 2019
 Mexico, New England


 The Battle of
 El Mazuco

Name: Cueva Llonín, Cueva del Agua

Location: Close to easterly road up to Llonín; see directions PDF, also revised directions from 2011

GPS: N43°19'57" W4°38'46"

UTM: 30T 366.65 4799.26

Alt: 150 m


Map: 1:80,000


Cueva Llonín formations

Cueva Llonín formations

Description: Narrow entrance followed by a squeeze; crawl to rift which leads to a pitch via a corner with some stals (pictured). Decorated chamber (see below).


2007 – Jim Thomson’s recommendation to view

2008 – GPS fix entrance

2011 – Bill to squeeze, Mike to pitch


From Cave Science 51 (1973), Guy Cox, section VIII, #3:

Cueva del Agua. At Llonín, in a limestone cliff 15m from the road. A narrow entrance leads to a passage, which ends after 20m in a 12m pitch into a large, well-decorated chamber. (Derouet et al., 1954; Llopis et al., 1955)

Expeditions to the Picos de Europa and elsewhere since 1973.
Please e-mail Mike Cowlishaw ( or Bill Collis (
if you have any corrections, suggestions, etc.   See also the SpeleoTrove speleology section ».
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This page was last edited on 2019-07-06 by mfc.