The pororoca is a tidal bore (a rare tidal phenomenon where the leading edge of the incoming tide forms waves that travel up the river against the direction of the current) that creates waves up to 12 feet high. In this case it occurs at the mouth of the river where it meets the Atlantic Ocean. Since 1999, there has been an annual surfing championship held during the pororoca. Brazilian Picuruta Salazar won the last event with on a wave that took him 12.5 kilometers and gave him a ride of 37 minutes on the same wave. Most surfers are happy with a 5-8 second ride here on the west coast! Check the vid!