Place: Sierra de Guara (Huesca); Formiga, Oscuros de Balcés, Peonera, Vero, Barranco Fondo, Barrasil, Gorgas Negras, Mascún Superior, etc.
Physical conditions: a minimum of physical shape, being able to swim, not being pregnant, not having chronic diseases incompatibles with the activity.
Knowledge and previous experience: not required.
Weather conditions: the river flow must be suitable (the guide will assess it the day of the activity).
When can you do it? All year round, depending on the weather forecast and the river flow.
How long does it take? From 3 to 8 hours.
Meeting point: Camping El Puente or Apartahotel Valle de Rodellar.
How long in advance should you be there? 5 minutes before the activity starts.