427 Torca de Lastrilla
N Vega 30T 0449496 4796583 Altitude 356m Length 275m Depth 118m

Updated 5th March 2000; 8th June 2002; 9th November 2003; 25th Febraury 2007; 25th June, 7th October 2010; 5th October 2011

Incomplete description

The 7m entrance shaft is in clean, white limestone and lands in a descending rift with lots of loose boulders. This drops into a hading rift at right angles and the top of a 16m pitch which is tackled in two steps. A steeply sloping boulder-filled rift reaches another rift requiring a short ladder to reach the head of a 37m pitch. At the base ..........BETTER THAN WHAT'S IN '81-'82???

Up a stal cascade above the 37m pitch is a superb view out into a very large chamber stretching out below. A 20m ladder is needed on the slope down to the floor. The 10m square passage continues as a ramp down ending in ??m pitch to a mud-floored chamber.

At the north eastern end is a loose climb on boulders up to a small hole which ends at the head of an extremely loose, 16m pitch. The base draughts slightly but is not a good digging site.

The site was re-explored in 1996. Can someone re-write the above?

The cave was tackled up at Easter 2010 with a view to re-exploration around the pitches below the entrance. The p24 was left as it became too tight for SRT. A chamber is visible through a gap that needs enlarging and there is also a chamber visible at the "?" at the top of the p24.
In the summer, in the chamber at the base of the 37m pitch, a very tight squeeze around a right angled bend was followed to where a small chamber can be seen through a slot. This slot was enlarged then further enlarged in the summer 2011. Removal of floor debris and further enlargement allowed acces to an aven with pitch below. This pitch is more 10m deep and needs work at the top before a descent can be made. (Sketch)

References: anon., 1983a (Easter logbook); Corrin J, 1983c (survey); anon., 1985b (logbook); material in file; Corrin J, 1994a; Corrin Juan, 1995b; anon., 1996b (logbook); García José León, 1997 (survey); anon., 2007a (February logbook); anon., 2010b (Easter logbook); anon., 2010c (summer logbook); León García José, 2010 (survey and photo); Corrin Juan, 2011; anon., 2011d (summer logbook)
Entrance pictures : yes
Underground picture(s):
from summer 2011
from Easter 2010

Scanned slides by Frank Addis (1985). Click to enlarge. A1: Top of the ramp. A2: Pitch at the base of the ramp. A3: Top of the 60ft pitch above the ramp. B1: Top of the 50ft pitch.
	1	2	3
A
B

Detailed Survey : from 1983: low res  high res : sketch of 2011 extension to p10+
Line Survey :
On area survey :
Survex file : yes