Also known as whitewater streaming, this activity will take you down a stretch of the River Errobi (Bidarrai) or the Bidasoa (Bertiz) equipped with a 'water sled' and flippers. Feel the thrill of the rapids, swimming the whitewater current and surfing the playful river waves.

• Level I: Hydrospeed for children aged 9 to 12 (see school programmes). Aimed at familiarising children in the sport and enjoying the salmon-filled River Bidasoa. Length of trip: 1h 30.
  
  
• Levels II-III: The River Errobi in Bidarrai is ideal for beginners. Children must be 13 years or older. Length of trip: 1h 30.
  
  
• Material: Navarra Aventura BKZ will furnish you with everything you need (neoprene wetsuit, helmet, life jacket and water sled, plus changing rooms, toilets and insurance). All you have to bring is your swimsuit, footwear that can get wet, and a towel.
  
  
• Remarks: Participants must be able to swim; any particular problems should be reported to the guide.