As Hua Hin is on the main (and only) north-south train line, it is easy to travel up to Bangkok or down to the deep south.
Train routes are normally more pituresque than bus routes and whilst this method of travel is generally slightly slower than the buses, it is infinitely more comfortable, particularly on long and overnight journeys.
There are three classes of accommodation - 1st, 2nd and 3rd. 1st class sleeper compartments are air conditioned and for two people. They have a wash basin and there is even a cold water shower in the carriage's toilet. Food and drink can be ordered and brought to your compartment. This is a comfortable, relaxing way to travel long distances.
2nd class accommodation comes in a variety of formats. Sleepers with bunk beds. In these, the arrangement is open-plan and the carriages are either air conditioned or with fan. Alternatively, there are seated carriages which can be either air conditioned or fan cooled. Both are comfortable ways to travel shorter distances during the day.
Finally, 3rd class carriages come with either padded or wooden benches and are surprising clean and comfortable for short journeys.
Tickets can normally be purchased from Hua Hin station on the day of travel, but for the more luxurious carriages, forward booking is advisable. This is particularly essential during holiday periods when the trains are sure to be full. On the longer, more popular routes, advance tickets can be purchased 90 days before your date of travel.