Grotte-évent de Tantayrou
A heavily eroded cavity in the Causse de Séverac, traversed by a picturesque stream with cascades, with a development of about 4000 m, of which 2200 m are sumps.
EspeleoWorld
Grotte-évent de Tantayrou
A heavily eroded cavity in the Causse de Séverac, traversed by a picturesque stream with cascades, with a development of about 4000 m, of which 2200 m are sumps.
Sévérac d'Aveyron
Length: 3200 m
Updated record
https://espeleoworld.com/en/c/grotte-event-de-tantayrou-severac-d-aveyron-aveyron
Information can change. Always verify coordinates, access, weather, and cave conditions before setting out.
A heavily eroded cavity in the Causse de Séverac, traversed by a picturesque stream with cascades, with a development of about 4000 m, of which 2200 m are sumps.
Description
Morphology
Development of about 4000 m, of which 2200 m are sumps.
To the left of the entrance porch, a narrow joint opens after 10 m onto a step and a chamber. One climbs a two-storey gallery up to a cascade 4 m high. At the top of this, one is at the confluence of 2 galleries. The left-hand gallery, which is wider, quickly joins the right-hand branch which, in a joint and cut by cascades, makes a wide detour. A fossil passage overlooks the active gallery. Upstream, the 2 conduits meet in a low chamber with a broken floor. One can climb this chamber for about fifty metres.
Hydrology
A heavily eroded cavity traversed by an important and picturesque stream with some beautiful cascades. Upstream, a zone comprising 11 sumps and 3000 m long follows the dry part. One must pass a fairly deep pool to reach the active gallery and the joint that follows. Then a long sheet of water leads to the first sump.
Progression
The use of a neoprene suit and a rope may be useful if the stream's flow is high and/or if one wishes to cover the last 100 metres in deep water before the sump.
Other details
See the descriptive sheet of the cavity, published for the Millau gathering: https://millau2013.ffspeleo.fr/pdf/Tantayrou.pdf
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Contains information from Grottocenter (Wikicaves), grottocenter.org, made available under the Open Database License (ODbL 1.0, https://opendatacommons.org/licenses/odbl/1-0/), modified. · https://grottocenter.org/ui/entrances/25226 · The derived data is available on request under the ODbL: [email protected] · data as of 2026 · Source: Grottocenter (Association Wikicaves), worldwide collaborative cave database (grottocenter.org), modified. CC BY-SA 3.0, https://creativecommons.org/licenses/by-sa/3.0/ Grottocenter (Wikicaves) · Text by BTH (Voir la fiche descriptive de la cavité, éditée pour le rassemblement de Millau) · adapted by Espeleoworld (normalized, translated); the adaptation is licensed CC BY-SA 3.0, https://creativecommons.org/licenses/by-sa/3.0/ · https://grottocenter.org/ui/entrances/25226 · data as of 2026