Lago Ercina

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Site list/GPS fixes

Walks/GPS tracks 

Coordinates used

LED projects:

 Lamp tests
 ISP isolators
 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



 The Battle of
 El Mazuco

Entrance pitch, Pozu del Vega El Forcau

Entrance pitch, Pozu del Vega El Forcau

Name: Pozu del Vega El Forcau

Location: 2.5km SSE of Lago Ercina

GPS: N43°14′56″ W4°57′58″

GPS: N43°14′52″ W4°58′03″ (2011 fix)

UTM: 30T 340.39 4790.42

Map: Macizo Occidental de los Picos de Europa (cave site 15) at x=340.4, y=4790.4, alt. 1480m


by members of Forcau ’76, 1976 300dpi BCRA Grade 4b

Description: Target of the Forcau ’76 expedition, described in detail in OUCC Proceedings 8 » – survey on page 8. Report also available in plain text version ».


1975a – locate entrance, with SCAL (Spéléo-Club Alpin Languedocien).

1975b – 07:15 start. With French from SCAL (Philipe, Veronica, Martin, Sallia, Francois, Gilbert, Pierre +2, Alain). Two parties to cave 12:30 and 15:30. Descend six pitches (11, 8, 8-15, 7, 37, 5+25m). Second party leapfrog first and on down 7th (9) and explore beyond to duck, etc. then return to find Gilbert stuck on 6th, requiring assistance out. All finally out by 02:00 and back to camp by 04:00.

1976a through 1976x – full exploration and survey of the cave (Forcau ’76 – see references above).

1988 – walk to entrance (BC, EC, MC) in mist.

2001 – 25th anniversary walk to entrance (2hr:15 up, 1:30 down, including many stops).

2006 – 30th anniversary walk to entrance (1hr:40, including side-trips).

2011 – 35th anniversary walk to entrance (1hr:40, including many photo stops).


The entrance is a bit tricky to find. From the small ‘peak’ in the middle of the valley (≈200m at 210° from the El Forcau pass) the cave is underneath a brown stone outcrop at 220°, perhaps 200m from the peak.

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 2015-09-09 by mfc.