Tresviso Caves Project

Tresviso Caves Project Gazetter

TCOV9: Torca de la Grenata

(Grenade Hole)

East, North:361266, 4790317 (nearby)
Coordinate Quality:GPS
Long, Lat:-4.7090927055466, 43.252867408192 (map)
Elevation (m):1024
Length (m):25
Depth (m):-18
Active Lead:
Survey Available:


From the Tresviso Sotres road, follow the track down into the Sobra Valley and head along same route as if going to Cueva de la Marniosa. From the cabanas below Marniosa follow the concrete track up until it ends (0361213, 4790478 937m). Head in an SSE direction going anticlockwise around the western side of the lump of limestone which contains the Marniosa entrance. Heading uphill on a muddy, bramble slope through trees you soon will find the entrance, on the left as the lump of limestone creates a wall to your left.

Entrance is a man sized opening, not to be confused with the hole 5m to the right which is a crawling sized entrance.


Entrance is a man sized opening,


Once through the entrance, a short slope down where a traverse line/abseil is useful, gains the 18m pitch which lands in a chamber.

Downslope a hand grenade was found in the centre of the passage 2m from either wall. Beyond the grenade chamber, a 1m wide crawling passage continues to a short 5m pitch down into a lower level which can be rigged from naturals. In the lower level, a crawl through into a passage to the right gains a chamber with an inlet in the right hand side, thought to connect back to the grenade chamber.

Continuing over the top of the hole down to lower level, the passage continues. A freeclimb/abseil down a 2m drop leads to a chamber here is approx. 2m wide and 3m long with an outlet at one end, not of human proportions. No way on




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