Rivers North of Pan Nga Bay:

All of them are navigable without difficulties ( for a catamaran that is). The main Klong Ko Pan Yi is very large and not particularly interesting. Nearby Klong Khao Raya is however very beautiful with splendid scenery of huge solitary limestone mountains and an exciting five mile passage through a narrow creek in the mangrove forests. The mangrove woods have hundreds of creeks which make for interesting forays by kayak.