It starts up at the Cúber dam. This is its natural drain at the foot of Puig Major - 1415 n - and the water runs between the Tossals massif and the Puig "sa Rateta", both higher than 1000 m, until it arrives tamely to the "font des Pi" near the Tossals shelter. The sporting part takes place in the middle of the walls and rocky landscape that well deserve a visit... (or two).