Diving operator Scuba Junkie's affiliated river-rafting outfit comes highly recommended by travellers. It specialises in whitewater rafting expeditions on Padas River (full day, grade III to IV rapids, RM250 per person) and family-friendly Kiulu River (half-day, grade I to II, RM200 per person). Leisurely boat tours and proboscis monkey spotting in the Klias wetlands also offered. Bookings normally require 24 hours' advance notice.