The Grandvalira Bike Park situated in Soldeu is the largest mountain bike park in the Pyrenees and is by far the best place for freeride, enduro descents and cross-country.
Grand Valira is actually the brand name of the whole ski area (Europe’s biggest) that includes: Soldeu, El Tarter, En Camp, Pas de la Casa, Porte des Neiges, Grau Roig and Canillo. In the summer time the Bikepark is opened in the Soldeu sector, but runs under the brand name of Grand Valira. The Bikepark is managed by Oscar Saiz who is well known in downhilling and has competed in the World Cup for many years.
More videos here.
Not sure if the park is still operated.