Lago Ercina

Speleogroup  title


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: Cueva Gesaltza

Location: 4km almost due South of Oñati, near Santuario de Arantzazu

GPS: 100m W of N42°59'25" W2°25'15"

UTM: 100m W of 30T 547.33 4760.11

Description: Large entrace in 70m cliff leads to 200m of boulder-strewn gently descending passage to the top of a pitch. The pitch consisted of a possibly free-climbable 3m drop onto a landing followed by a further 5m drop (probably overhanging) to continuing dry streamway. The local landowner confirmed the name of the cave

2006 – to top of pitch.
2018 – unfriendly locals; moved on.

A farm with the name Gesaltza is marked on maps and is directly above the cave.

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 ».
The pages and data here are for non-commercial use only.   All content © Speleogroup 1973, 2023, except where marked otherwise.  All rights reserved.  Here is our privacy policy.

This page was last edited on 2019-07-06 by mfc.