To find out all you want to know about the Picos de Europa, here are a few interesting sites containing photos, maps and plenty of practical information:

• www.paraisosperdidos.com
• www.picoseuropa.net
• www.igijon.com/personales/lospicos

The National Park has it’s own official site:

• www.mma.es/parques/lared/picos

Sites of European professional Mountain Leader associations:

• Asociación Española de Guías de Moñtana (Spain)
  www.aegm.org

• Syndicat National des Accompagnateurs en Montagne (France)
  www.accompagnateur-en-montagne.com

• Union Professionnelle des Métiers de la Montagne (Belgium)
  www.upmm.be

• British Association of European Mountain Leaders (U.K.)
  www.baeml.org

A few associates:

• A friendly Belgian operator specialized in fauna observation tours. European and non European destinations.
  www.univers-nature.com/nature-terroir
  
  
• Brussels hiking association offering various activities in Belgium and abroad. Very professional.
  www.lesaccompagnateurs.be