Prachin Buri: At Khao Yai National Park, the Kaeng Hin Phoeng in Nadi District of Prachin Buri is a stretch of river noted for its wild beauty. The water is very vigorous during the rainy months (June-October), and some stretches are designated Level 5, the uppermost limit to whitewater rafting. Kanchanaburi: On the western border, Kanchanaburi is a popular adventure destination thanks to its mountainous terrain, covered with forests and crisscrossed with a network of rivers. Jungle rafting can be arranged from a mountain pass to the stunning Lawa Cave, a two-hour journey. Bamboo and inflatable rafts are also available for a trip down the Songkalia in Sangkhlaburi.

Rafting is fast gaining popularity among the young and young-at-heart. The mountainous regions of the North are the natural venue for whitewater rafting, especially after the rains from June to October when the rivers swell with floodwater. But first-class rafting is also to be found in the northern reaches of the central region. Mae Hong Son: There are five levels of expertise, and all require experienced guides to lead them. Mae Hong Song's Pai River is perhaps the most famous venue, as it smashes its angry path towards Myanmar. A raft trip starts at Ban Nam Kong, 65 km from Pai and continues through virgin forests, waterfalls and 15 sets of rapids, a journey time of about five hours. Chaing Rai: One of the oldest rafting destinations in the country, Chiang Rai continues to draw adventure seekers from all over the globe. In Chiang Rai, bamboo rafts and inflatable boats are available for the journey down the Mae Kok, the province's major artery. Chaing Mai: Rafting down the Mae Chaem through Ob Luang George in inflatable boats is available through Mae Sot Travel. Another challenging route is the Mae Tuen in Omkoi District, where the river rushes through virgin forests to end at the Pha Dam Waterfall. No rubber raft is available at the site, so it's best to book a trip with a tour agent in Chiang Mai. Phetchaburi: The headwater of Phetchaburi River, the province's major artery, lies within Kaeng Krachan National Park. The river offers good rafting; a trip through its rapids and small tributaries takes about six hours.

Nakhon Nayok: As a rule, canoeing and kayaking is available at the destinations that provide rafting. Nakhon Nayok, a small province to the north of Bangkok, is a new destination for adventure tourism. Its rivers originate in the Khao Yai range and flow down to meet the arterial Bang Pakong River, which empties into the Gulf of Thailand. Nakhon Nayok has several waterfalls, the most popular being Wang Takhrai. Canoeing here is relatively new. The best time to visit is June-October. Starting point for a canoe journey is the stretch of Wang Takhrai canal where it flows through a coffee plantation. The waterway is quite narrow and therefore unsuitable for larger vessels. The route has no difficult rapids, but its many twists and turns more than make up for it.   Preparation Safety is paramount in whitewater rafting. Life jackets and helmets must be worn at all times. Your guide should explain to you all relevant safety procedures before you go, and check weather reports and the condition of the river. You should be able to swim if you wish to go whitewater rafting.