The Chico is the wildest navigable river in the Philippines. Half- and full-day rafting trips run from Tabuk through a series of Class III and IV rapids — the "Surprise," "Roller Coaster," and "Wall" sections are the named ones, though the best stretches change year to year as the river shifts.
Trips are organised by local outfitters in Tabuk; the usual season runs from about June through January when the water is high. Rafts seat six plus a guide; expect to be soaked and to swim at least once if the level is up. The scenery — limestone walls, dense forest, occasional rice terraces — is as much of the attraction as the rapids themselves.