Hill tribe peoples originated in Southern Asia. While it is generally accepted that their arrival in Thailand dates back over 100 years, as nomads, no one can be sure when they first came. They are found in the North of Thailand, most often at higher elevations.
By most accounts, there are 20 different hill tribes, each with its own culture -
including language, food, religion and costume. They are particularly well known for their colorful garb, and you will see photos of hill tribe people on post cards and at travel agents all over Thailand.
Many hill tribes are on the verge of extinction, for example the Yellow Leaf People (Mlabri). By most accounts, there are fewer than 200 Mlabri left in Thailand.
The major hill tribes are the Karen (the Padong or "long neck people" are a sub groups of the Karen Tribe), Hmong (Meo), Yao, Lisu, Lahu, Lawa and Akha. While most hill tribe people are poor, they are responsible for bringing in a significant amount of tourist dollars to the country. A lot of this comes from hill tribe trekking.
Trekking - or hiking - has been a part of tourism in Northern Thailand
for well over 30 years. Nowadays, treks usually involve a relatively
short hike or mountain bike ride. They sometimes include an elephant
ride and rafting.
There are, of course, longer treks to more remote areas. Most treks are fairly good value for money, but you should shop around.
NOTE: Many human rights organizations contend that the hill tribes of Thailand are exploited. You should try to acquire as much information as you can on this topic and if you decide to take a hill tribe trek, try to choose one that in both ecologically friendly and nonexploitative.