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:

  Spain 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, 2020, 2021,
  2022, 2023
  New England


 The Battle of
 El Mazuco

Name: La Borbolla Cave and village

GPS: Cave: N43°21'50" W4°38'02", Village: N43°21'56" W4°38'05"

UTM: Cave: 30T 367.73 4802.73, Village: 30T 367.66 4802.92

Lambert: 5231 9737 ≈ N43°21'54" W4°38'02" – this spot is 150m W of ‘Nacimiento río Cabra’ shown on Google maps and at ‘Branivieya’ on topo maps (500m SE of Borbolla church).

Map: Columbres (32-IV)

Location: 3km inland from Pendueles/Buelna

Description: Village with various speleological features nearby, first visted by OUCC in 1969:

“Near the village of La Borbolla is the source of the Río de las Cabras, a very large and impressive resurgence cave. Some 20m up the cliff above it is another entrance, in which the stream can be seen again. The underground course of the stream can be followed by a series of shake-holes and collapses, and some kilometres away a pothole gives access to the stream again.  At the time of our visit, the system was in an extreme state of flood, and it was not possible to make any progress in any of these caves. It seems possible that most of the underground streamway is collapsed...”

For description of the cave above resurgence, see OUCC report 6, 1974 » (there is no mention of looking at the valley in 1974)

Survey: 1974 » CRG Grade 1


1988 – “big chamber entrance 30m mossy climb above three Molinos ... next to major valley West very promising, with probable resurgence, saddles, etc.

1989a – walk down from Lubiesco

1989b – “Up the valley just west of [La Borbolla] village, then east up-valley to line of depressions. The highest had a strongly-draughting hole (too-small, but class-A dig)”

2006a – explored new track but too wet to cover depressions

2006b – depressions west of village; top depression at N43°21'45" W4°39'58", middle (El Jorcón) at N43°21'46" W4°39'58", lowest at N43°21'47" W4°39'12" – lowest had strongly draughting but unenterable hole, possible dig

2018 – walks to and above the resurgence, also pleased to find bar in village

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.