[KukkoDrukko]

No, trekking on your own is potentially dangerous if you head into the wrong areas, and you've no real way of knowing where they are. If you trek from Chiang Mai / Chiang Rai area, you could accidentally wander into poppy fields, get caught up in the struggle between the Karen and the Burmese, just get randomly mugged or whatever else.

An Australian was shot and killed and his girlfriend stabbed in 2000 when they did a similar unaccompanied trekking trip in the Chiang Mai region, this has information about it- http://worldtwitch.virtualave.net/doi_ang_khang.htm . It says the area is "known as a lawless region harboring several armed groups, many of them financed by heroin or amphetamine dealing". Almost all embassies warn against doing trips like this and insurance probably won't cover you for it either. Thailand is generally very safe but going trekking not in an organised group is just about one of the least safe things you can do there IMO.

[artenotreah]

I guess you are not planning to go alone and will sign up with a trekking company? You shouldn't experience any problems. This is a very popular activity these days and thousands go every week. The challenge is to find a trekking company that will guarantee that you will see no other foreigners!

[DenisMoor]

The answer to your question "is it safe?" is a bit difficult to answer. If you take the usual precautions then you will experience no problems. But, it sounds like you are planning to head out into the mountains on your own without a guide. That is not advisable. That is like me going for a stroll in the outback with only a bottole of water. My advice is, go on an organized trek, you will see more and have a better and safer experience.

(p.s. I deleted some of your other posts yesterday as they were repeats. I also merged some that were on the same topic. If you wish to ask new questions on the same topic, please click on "add reply". Thanks.)

[fashikn]

Korb koon khun Darunie.
Sawatdee khrup.
Do mobile phones work in the area?