Rock climbing in Thailand is practised wherever there are rocks-and even some places where there are not.
Clubs like the Thailand Rock Climbing Federation (Tel: 0 2373 8725, 0 2729 4773), and the Bangkok Rock Climbing Club (Tel: 0 2434 6100, 0 2435 5797) can furnish you with details of climb sites wherever you are travelling in the kingdom, including artificial practice walls in Bangkok.
Some of the best locations for rock climbing are in the central regions near Huai Kha Khaeng Wildlife Sanctuary in Uthai Thani Province, or in the spectacular limestone mountains that run through Kanchanaburi, Phetchaburi and Prachuap Khiri Khan.
On the East Caost and easily accessible from Bangkok are sites in Chon Buri. The spectacular coastal cliffs of Railay Beach in Krabi are the climbing focus of the South, with further pitches to be found on some of the islands.
Climbing is a technical sport. You should not go alone, especially if you are a beginner. The discipline is safe if you use first-class equipment, go with an experienced guide and teacher who shows you how to practice safe climbing, and if you follow safety procedures.
As well as safety issues related to climbing, make sure you protect yourself from the sun. It is easy to get burned if you are on an exposed rock for long periods. Sunblock is essential.