Most travelers who go trekking do it around Chiang Mai. But wouldn’t it be better to do it somewhere else (Chiang Rai?) to get a bit more authenticity?
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Duration: 3D/2N.
For now, our itinerary isn’t set in stone, so this trek can be done just about anywhere.
The issue in Chiang Mai is that just about any outing that includes an elephant camp, bamboo rafting, or similar activities AND a bit of jungle is called a "trek" because the term must be way more marketable than "excursion for tourists." So if you only want to hike and sleep in ethnic villages at night, make it clear you only want to do that and rule out any trek where part of the journey is by vehicle (except for the trip from Chiang Mai to the actual starting point of the trek and back at the end).
Almost all accommodations resell treks from agencies, so they’ll try to sell you something (they earn a commission), but to avoid bad surprises about quality, ask to meet the guide who’ll be accompanying the trek—you’ll need to ask them your questions.
In Chiang Rai, trekking feels a lot less like an "industry," the options are a bit more limited, but the landscapes are just as beautiful.
Mae Hong Son is also an excellent base for trekking in its stunning region. In fact, many travelers go there mainly for trekking and white-water sports. Plus, you’ll meet a slightly different crowd than in Chiang Mai. In M.H.S., you’ll find agencies organizing treks from 3 to 10 days.
Elsewhere, trekking options are available from Tha Ton, Soppong/Pang Mapha*, Mae Sariang, and more. You’ll find them pretty much everywhere, often organized by guesthouses.
*In Soppong (Mae Hong Son province), this guesthouse is nice, and even though I haven’t done their treks, they have a good reputation:
https://www.cavelodge.com/. But near the minivan stop, you’ll see flyers with other offers from more rustic guesthouses that also organize treks.