Train 7 from Bangkok to Chiang Mai is an all 2nd class seat, air-condition Diesel Railcar - Sprinter Train, that travels through the day and is the quickest way to get to Chiang Mai out of all of the SRT rail services.
2nd Class seats only.
Ticket prices for this service include a meal and some soft drinks.
The meals are not that great or filling, so on this long trip you should bring some food and drink of your own
The duration of the journey to Chiang Mai from Bangkok by train 7 is exactly 11 hours (scheduled time).
This compares well with travel by bus, which usually takes between 11 and 12 hours.
This service is also one of the least likely trains to be delayed.
When there are delays along the lines, the cheaper, slower trains are usually left to wait at the station or siding, letting the faster Special Express services pass by and hopefully keep on time.
The answer to that is YES.
You will need to make a reservation for your seat for this train and the chances of there being any tickets left if you just turn up at Hua Lamphong Railway Station is very slim during the high season.
Booking train tickets in Thailand is relatively easy.
You can book tickets from any main railway station within Thailand (to / from any destination).
If you are not in the country, your best option is to book online (admin fees apply).
Tickets for this service are available to purchase 90 days in advance