Gruta de San José

Rio Subterréneo de San José - Les Coves De Sant Josep

Useful Information

Location: Near Vall D'Uixó. 6km from the N340, 25km south west Castellón.
Open: JAN to MAY daily 11-13:15, 15:30-17:45.
JUN to JUL daily 11-13:15, 15:30-18:30.
AUG daily 11-13:15, 15:30-19:15.
SEP daily 11-13:15, 15:30-18:30.
OCT to DEC daily 11-13:15, 15:30-17:45.
Fee: Adults EUR 9.50, Children (4-13) EUR 4.50, Children (0-3) free, Seniors EUR 6, Family (2+2) EUR .
Groups (25+): Adults EUR 6.
Classification: SpeleologyKarst cave. SpeleologyRiver cave.
Light: electric, LED.
Dimension: L=2,348m, T=20°C.
Guided tours: L=1,150m.
Photography: not allowed
Address: Rio Subterréneo de San José, Vall D'Uixó, Castellón, Tel: +34-964690576, Fax: +34-964690576. E-mail: contact
Ajuntamiento de la Vall d'Uixo', Plaza de Centro, 1, 12600 La Vall D'Uixo', Tel: +34-964-690184, Fax: +34-964-667662.
As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
Please check rates and details directly with the companies in question if you need more recent info.


18th century mentioned in Historia Natural, Geografía, Agricultura, Población y Frutos del Reino de Valencia (Observations on History Natural, Geography, Agriculture, Population and Fruits of Kingdom of Valencia) by the Naturalist Josep Cavanilles (Vol I, pp 115-116).
1902 two groups competed in exploring the cave.
1915 explorationby the famous historian Carlos Sarthou Carreres.
1926 a party of esplorers reached the Llac de Diana (Lake of Diana) but was unable to cross the Galeria dels Sifons (Gallery of the Siphons).
1929 Herminio Arroyas Martinez died in the cave while trying to develop the cave for tourists by installing footbridges.
1936 footbridges replaced by a boat, electric light installed.
1950 new entrance tunnel built to oid the Mouth of the Furnace.
1954 explorations by the cavers group of the Centre Excursioniste de València.
1958 first survey by the same group.
13-NOV-1960 Galeria dels Sifons finally crossed by Joaquin Saludes from the Centre d'Investigacions i Activitats Subacuatiques de Valencia.
14-APR-1961 tunnel completed to reach the cave behind the Galeria dels Sifons.
1971 new galleries discovered.
1973 new parts opened to the public.
1975 new galleries discovered.
2019 LED light by Cave Lighting.


The Grutas de San José or Rio Subterréneo de San José is, as the name says, a river cave. The visit is done by boat, and the river is said to be the longest navigable cave river in Europe (what ever this means).