There are two options for the Rafting in Iguassu Falls, Brazil:
FIRST OPTION: it lasts 3 hours and one must COMBINE this tour with the Macuco Safari and boat trip. The rapids vary from the 1.5 level to the 3.5 level depending on the water level. When the water level is good, there are about 1,000 meters divided into 3 sets of rapids plus 2 km of paddling downstream. During the tour, one can also be swimming in the Iguassu River.
SECOND OPTION: There is a chance also to buy the ticket only for the white water rafting. In this case the tour it will last around 90 minutes including travel time to the end of the trail.
How to get to this option? As you arrive at the first lockout (the main one at the beginning of the trail), walk to the left for 30 meters, they have a ticket office there.