The first 60 days of my multiple entry touristic visa (6 months) are about to end.

 

I couldn't quite find information about the procedure to get out and back into the country, specifically, if I have to provide all the documentation as usual, how long should I stay out, etc...

 

Also, I wonder if the famous border runs (within the same day) from udon thani to nong khai are still a thing? I've read contrasting reports about this...

 

 

Go immigration and extend for a

further 30 days before having to do your first boarder run 

You have a visa namely METV.

You can border bounce same day at places such as NK. 

 

You can fly out and back and there is no requirement of how long you need to stay out of Thailand.

 

You do not require an onward flight if re-entering via air as you have a valid ME visa. 

 

Obviously to enter countries such as Laos you would require a visa.

 

You can obtain a 30 day extension to every entry from your non O .

 

If you are visa exempt to Vietnam you could consider mini holiday to Saigon.

Did it few weeks back. Magic joint. 

Dr. Jack54. Spot on just done it with METV Thailand visa went to Laos at Nong Khai. 40 dollar 30 day visa on arrival into Laos, then returned 60 days into Thailand. Simple 

14 minutes ago, Toby1947 said:

Dr. Jack54. Spot on just done it with METV Thailand visa went to Laos at Nong Khai. 40 dollar 30 day visa on arrival into Laos, then returned 60 days into Thailand. Simple 

For your next one consider 

Saigon.

Depends little bit where you are located in Thailand and also if you qualify visa exempt entry to Vietnam.

I had to get eVisa. Simple process.