Category: Marniosa

2019 Summary

A distinct lack of enthusiasm from people for writing up the expedition….. A post trip summary follows: The Tresviso expedition returned back to the UK last week and the following is a brief summary: Cueva del Nacimiento – Parting Friends In the entrance series of Nacimiento is an area called the Road to Wigan Pier…
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Through-trip!

Cueva de la Marniosa In the early 1970’s a group of students from Lancaster University Speleological Society (LUSS) touring Northern Spain heard about some caves near Tresviso, Eastern Picos de Europa.  In 1975, their first year visiting caves of Tresviso, they explored upstream, into the Sobra valley and found a crack in the side of…
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T20A Silvestre Pot exploration log

Extract from various sources on exploration of Silvestre Pot (Alistair Gott) Part 1 Sobra valley is part of the stream catchment for cueva del marniosa, very little was known about the stream sinks until 5 days ago. Cueva del marniosa is one of the two well known stream caves in the Tresviso region. Imo furlong,…
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Silvestre Pot (Sobra Valley)

An early start was arranged, which would normally mean an early night. 2am was the actual bedtime for most on the trip. The agreed start time of 9am was fairly well stuck to and saw us at the cave by 9.45am. Upon arrival at the track, AG decided to put his caving kit on and…
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Practice Pot (IM2) Cueva Donga (AS 1) & de Silvestre (KJ1)   

By Stu Coxon  We left the hostel with the intention and kit to look at the tight section in Cueva Donga and hopefully enlarge it. Our secondary objective was to have a look at the pitch in the entrance of what is now known as Practice Pot. Alistair and Dreads went over to Practice Pot…
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Cueva del Marniosa – Upstream avens (Part 2)

by Dan Workman The planned trip as of Monday eve was Sam and I to continue the climbing whilst Dave and Derek resurveyed the upstream passage behind us. However, in the morning Derek was not feeling up for caving and we were reduced to a group of three. We set off slightly later than planned…
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Cueva del Marniosa – Upstream Avens (Part 1)

by Sam Deeley Having been driven down to the entrance by Joe, we entered the cave at 1300. Bob and Dave led the way to the streamway, after which we split into two parties. Following the directions of Dave, specifically details of the climb over a calcite flow, we reached the first boulder choke. Quickly,…
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Cueva del Marniosa – Sump 2 push         

   Josh Bratchley, Rob Middleton, Joe Daniels, Arwel Roberts A late start saw us in the cave not long after 13:00 (much better via Land Rover) and good progress was made down the entrance series to the 1st Pitch in the downstream passages where we’d left our 3 bags of cylinders the day before. Here…
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Updates

Pozo del Castillo After 30 years of a blocked snow plug, preventing access to the lower reaches of Castillo, the snow plug has melted.  The previously scary boulder held up by snow, is now held up by air and luck.  A 100 year old winch has now been revealed, and more large scary boulders.  The…
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Tresviso 2018

Expedition Dates 1st September to 15th September 2018 – main expedition dates Objectives The expedition has a number of goals.  The following are a few primary objectives: Cueva del Nacimiento Jurassic World – Terror Firma – multiple avens and climbs, Pina Colada Bypass – a 3-10m rift leads off from the Pina Colada sump. Joe’s…
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